1992-09-01 Utilities & Street Improvements SpecsSpecifications
for
1992-31MPROVEMENT
PROJECT
(UTILITIES AND STREET
IMPROVEMENTS
PSYKS FIFTH ADDITION)
Albertville, Minnesota
MEYER-ROHLlN,1NC.
ENGINEERS-LAND SURVEMRS 1111 Hwy. 25 N, Bulfeb, Mim 55313 Phone 612.682-1781
September 1, 1992 E-9201 G
SPECIFICATIONS
FOR
1992-3 IMPROVEMENT PROJECT
(UTILITY and STREET IMPROVEMENTS
PSYKS FIFTH ADDITION)
ALBERTVILLE, MINNESOTA
MEYER-ROHLIN, INC.
ENGINEERS AND LAND SURVEYORS
1111 HIGHWAY 25 NORTH
BUFFALO, MINNESOTA 55313
September 1, 1992
E-9201-G
Norman P. Gartner
I hereby certify that this plan, specification,
or report was prepared by me or under my direct
supervision, and that I am a duly Registered
Professional Engineer under the laws of the
State of Minnesota.
Heg. No. 17284
ADVERTISEMENT FOR BIDS
' 1992-3 Improvement Project
(Utilities ~ Street Improvements)
(Psyk's Fifth Addition)
' Notice is hereby given that sealed bids will be received by the City
Council of the city of Albertville, Minnesota, in the City Hall, until
' 2:00 P.M., Thursday, October 1, 1992, at which time and place the bids
will be opened for the construction of the following:
8" to 10" Sanitary Sewer 624 l.f.
' Manholes 2 each
4" PVC Service Pipe 765 l.f.
10" Cleanout 1 each
' 8" Cleanout ~ Cleanout Manhole 1 each
6" to 8" Watermain 1575 l.f.
Hydrants 5 each
' 6" to 8" Gate Valves 10 each
1" Copper Service Pipe 854 l.f.
12" to 2 4" Storm Sewer 1298 l.f.
27" to 48" Catch Basins 11 each
' Common Excavation (EV) 8687 c.y.
Seeding 1.6 acre
Aggregate Base Placed, Class 5 2200 c.y.
' Type 31 Base Course Mixture 8050 sy-in
Type 41 Wear Course Mixture 8050 sy-in
Sodding 1200 s.y.
Surmountable Concrete Curb & Gutter 2660 l.f.
' Density Tests 205 each
and other related items of work.
Plans, specifications and proposal forms as prepared by Meyer-Rohlin,
Inc., Engineers and Land Surveyors, 1111 Highway 25 North, Buffalo,
' Minnesota, 55313, may be seen at the Office of the Engineer, and the
Office of the City Administrator.
Each bid shall be accompanied by a bidder's bond, certified check or
' cashier's check in an amount equal to at least Five (5%) percent of the
amount of the bid which shall be forfeited to the City in the event
that successful bidder fails to enter into a contract within the
' specified time.
The City Council reserves the right to reject any or all bids and to
' waive any irregularities in the bidding, and further reserves the right
to award the contract to the best interests of the City. All bids must
be submitted on the proposal form furnished by the Engineer. Bids shall
be directed to the City of Albertville, securely sealed and marked on
' the outside as 1992-3 Improvement Project for Albertville, Minnesota.
Plans, specifications and proposal forms may be obtained from the
' Office of the Engineer upon deposit of Forty ($40.00) Dollars for each
set. This deposit will not be refunded
CITY OF ALBERTVILLE
BY:
' Linda Houghton, Clerk
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INSTRUCTIONS TO BIDDERS
In order for proposals to be entitled to consideration, they
must be in accordance with the following instructions:
A. GENERAL
All proposals shall be submitted on forms furnished by the
Engineer. All information, lump sums and unit prices requested
shall be completely filled out by typewriter or in ink. All
corporation bids shall bear the official seal of the corpora-
tion. The bid shall be submitted on the unbound proposal forms.
A proposal may be withdrawn, without prejudice to the bidder, by
written request prior to the hour of the letting. Proposals so
withdrawn may be resubmitted at any time prior to the time set
for opening of proposals. The Owner reserves the right to reject
any or all proposals, and to waive any informalities and
irregularities in the bidding.
B. QUALIFICATION OF BIDDERS
The Owner may request that the bidder submit information
necessary to satisfy the Owner that the bidder is adequately
prepared to fulfill the contract. Such information may include
past performance records, lists of available personnel, plants
and equipment, financial statements, or any other pertinent
information.
C. PREPARATION OF PROPOSAL
' The bidder shall submit his proposal on the forms provided by
the Engineer. The blank spaces on the proposal shall be filled
in correctly for every item for which a quantity is given, and
' the bidder shall state the prices for which he proposes to do
each item of work.
' The bidder's proposal shall be signed correctly in ink. The
signature acknowleges that the bidder is providing the informa-
tion required and has received all Addenda to the Specifica-
tions.
D. SUBCONTRACTORS
The names and addresses of all subcontractors that the bidder
intends to employ on the project shall be listed in the spaces
provided on the proposal form. No other subcontractors shall be
used on the project without the written approval of the
Engineer.
' page 2
E. BID SECURITY
Each bid shall be accompanied by a certified check, cashier's
.check, or bidders bond in the amount of five (5%)
erce
t
f th
p
n
o
e
bid, as a guarantee that the bidder will enter into the proposed
contract within the time specified. Should the bidder whose
' proposal has been accepted by the Owner refuse, fail or neglect
to execute the contract and furnish a satisfactory surety bond,
it is understood and agreed between the Owner and said accepted
bidder that the five (5%) percent of bid security shall be the
amount of the liquidated damages occasioned b
h
y suc
refusal,
failure, or neglect, and that thereupon said Owner shall realize
on such bid security and use the proceeds in payment of said
' damages. The bid security accompanying rejected bids will be
.promptly. returned to the bidders upon the execution of a
contract or the rejection of bids.
F. PLANS AND SPECIFICATIONS
' Copies of proposal forms, plans and specifications for use by
contractors submitting a bid may be obtained from the Engineer
on deposit of the sum of Forty Dollars ($ 40.00). This deposit
' will not be refundable.
G. EXAMINATION OF-SITE AND DOCUMENTS
Bidders shall satisfy themselves by a personal examination of
the site as to all local conditions affecting the performance of
the Contract, such as the structure of the ground, the existence
of surface and ground water, availability of drainage, obstacles
which may be encountered, means of approach to the site, and the
manner of delivery and handling of materials.
' The bidder, in submitting his proposal, is deemed to accept all
conditions as the same as are eventually found to exist and to
' waive all claim for extra compensation arising from the
encountering of unforeseen diffi
lti
cu
es except as the same are
expressly provided for in either the specifications or the
contract. Bidders shall also carefully examine the plans and
d
' rea
the specifications before submitting bids on the work to be
done. If any bidder contemplating submitting a bid for the
proposed contract is in doubt as to the true meaning of any part
' of the plans, specifications, or other proposed contract
documents
he ma
b
it t
,
y su
m
o the Engineer a written request for
an interpretation thereof. The clarification of the proposed
' _ documents will be made only by an addendum duly_issued. A copy
of such an addendum will be mailed or delivered t
h
o eac
person
receiving a copy of the plans and specifications and to such
other prospective bidders as have requested that they be
furnished with a copy of such an addendum.
' page 3
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' All addenda issued to bidders prior to the date of receipt of
proposals shall become a part of the contract documents, and all
proposals are to include the work therein described. Each
' proposal submitted shall list all addenda by number which have
been received prior to the time scheduled for receipt of
proposals.
' H. ADHERENCE TO SPECIFICATIONS
All work shall be done in strict accordance with the specifica-
' tions and plans and such addenda as may be issued from time to
time by the Engineer. Bidders shall be held strictly to the
intent of the plans and specifications.
I. REJECTION OF BIDS
The right is
such bid, as
interests of
' least thirty
receipt of bi
reserved to reject any or all bids- or to accept
in the opinion of the Owner will be to the best
the Owner. No bidder may withdraw his bid for at
(30) days after the scheduled closing time for the
ds.
J. CONDITIONS IN BIDDER'S PROPOSAL
The bidder shall not stipulate in his proposal any conditions
' not provided for on the proposal form.
K. INTERPRETATION OF ESTIMATES
' Bidders shall examine to their satisfaction the quantities of
work to be done, as determined from the plans and specifica-
tions. The Engineer's estimate of quantities as shown on the
' proposal shall be used as a basis of calculation upon which the
award of contract will be made, but these quantities are not
guaranteed to be accurate and are furnished without any
liability on the part of the Owner. Bidders must rely on their
' own calculations and shall be thoroughly familiar with the
contract documents.
'
L. DELIVERY OF PROPOSALS
' All bids shall be placed in a sealed envelope with a statement
thereon showing the work covered by the bid and addressed to the
address stipulated in the Request for Bids. Proposals may be
mailed or submitted in person. No bids will be received after
' the time set for receiving them. Bids arriving by mail at the
office of the Owner after the hour designated for receiving bids
will be returned to the sender unopened. The Engineer will not
deliver bids to the place of the bid opening.
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M. REJECTION OF PROPOSALS
Proposals may be rejected if they show any omission, alteration
of form, additions not called for, conditional bids or alternate
' bids not specified, or irregularities of any kind. Proposals in
which the prices are obviously unbalanced may be rejected.
' N. DISQUALIFICATION OF BIDDERS
More than one proposal for the same project from any individual
firm, partnership or corporation under the same or different
names will not be considered. Collusion between the bidders will
be considered sufficient cause for the rejection of all bids so
' affected.
Failure on the part of any bidder to carry out previous
contracts satisfactorily, or his lack of experience or equipment
necessary for the satisfactory completion of the work, may be
deemed sufficient cause for his disqualification.
' O. UNIT PRICES
In case of error in the extension of prices, the unit bid prices
' shall govern. The Owner reserves the right to waive any
informality in the bids at his discretion.
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PROPOSAL FORM
FOR
1992-3 IMPROVEMENT PROJECT
(Utilities and Street Improvements, Psyk's Fifth Addition)
ALBERTVILLE, MINNESOTA
Bids due on or before 2:00 P.M., October 1, 1992
City of Albertville
c/o Linda Houghton, Clerk
Box 131 .~
Albertville, M[V 55301
The undersigned as bidder, hereby proposes, and, if this proposal
is accepted, agrees to furnish a bond as required and to enter
into a contract with the City of Albertville, Minnesota, to
furnish all materials, labor, skill, tools and equipment for the
complete construction of street and utilities, including all
accessories as called for by the specifications herewith as
prepared by Meyer-Rohlin, Inc., Engineers and Land Surveyors,
1111 Highway 25 North, Buffalo, Minnesota, 55313, acting as and
in these contract documents entitled as the Engineer for the
following estimated quantities and unit prices.
BID "A" SANITARY SEWER
Item
No. Item
1. 8" PVC, SDR 35
(14-16')-
2. 10" PVC, SDR 35
(10-12')
3. 10" PVC, SDR 35
(12-14')
4. 10" PVC, SDR 35
(14-16')
5. 10" PVC, SDR 35
(16-18')
6. 10" PVC, SDR 35
(18-20')
7. 10" PVC, SDR 35
(20-22')
Qty. Unit Unit Price Total Price
15 l.f. $
a
150 l.f. $ $
75 l.f. $ $
130 l.f. $ $
72 l.f. $
66 l.f. $
116 l.f. $
$
page 6
s
Item
No. Item Qty. Unit Unit Price Total Price
8. Manhole, 48" dia.
(0-8') 2 each $ $
9. Manhole extra depth 12.3 l.f. $ $
10. 10" cleanout 1 each $ $
11. 8" cleanout ~ cleanout
manhole, 27" dia. 1 each $ $
12. 10" x 4" PVC
service wye 6 each $ $
13. 4" PVC, SDR 35
service pipe 765 l.f. $ $
14. Adjust existing manhole
w/2" rings 4 each $ $
15. Install chimney seal 1 each $ $
16. Density tests 60 each $ $
17. Crushed rock 30 c.y. $ $
TOTAL BID "A"
BID "B" - WATERMAIN
1. 6" DIP, CL 52
2. 8" DIP, CL 52
3. 8" 114° DIP bend
4. 8" x 8" x 6" DIP Tee
5. 8" x 8" x 8" DIP tee
6. 8" DIP plug
7. Remove ~ salvage
existing 6" plug
8. Hydrants
9. 6" resilient seat gate
valve, valve box
and riser
468 l.f. $ $
1107 l.f. $ $
2 each $ $
6 each $ $
1 each $ $
1 each $ $
1 each $ $
5 each $ $
6 each $ $
page 7
Item
No. Item QtY
10. 8" resilient seat gate
valve, valve box
and riser
11. Water service group 2
12. 1" copper service
pipe 85
13. 6" polyethylene
encasement 50
14. 8" polyethylene
encasement 110
15. Bacteriological test
~6. Density tests g
17.
Crushed rock 6
1
Unit Unit Price Total Price
4 each $ $
0 each $ $
4 l.f. $
l.f. $ $
7 l.f. $ $
3 each $ $
each $ $
c $ 0
0
.y.
$
TOTAL BID "B" $
BID "C" STORM SEWER
1. 12" RCP, CL III-C 241 l.f. $ $
2. 15" RCP, CL. III-C 201 l.f. $ $
3. 21" RCP, CL III-C 61 l.f. $ $
4. 24" RCP, CL III-C 795 l.f. $ $
5. Catchbasin, 27" di a.
(0-5') 3 each $ $
6. Catchbasin, 48" di a.
(0-5') 8 each $ $
7. Catchbasin extra
depth, 48" di a. 5.4 l.f. $ $
8. 24" RCP flared
end section 3 each $ $
9. 15" RCP flared
end section 1 each $ $
10. Common excavation (EV) 8687 c.y. $ $
page 8
Item
No. Item
11. Salvaged topsoil
from stockpile
12. Erosion control
barrier
13. Random rip-rap
Class III
14. Geotextile filter
type IV
15. Seeding (Green
Bulrush)
16. Seeding, mulching,
fertilizing and
disk anchoring
17. Free flow skimmer
18. Density tests
19. Crushed rock
BID "D" STREET
Unit Unit Price Total Price
976 c.y. $ $
1100 l.f. $ $
30 c.y. $ $
45 s.y. $ $
0.8 acre $ $
0.8 acre $ $
lump sum $ $
50 each $ $
10 c.y. $ $
TOTAL BID "C" $
1. Subgrade preparation 6285 s.y. $ $
2. Aggregate base
placed, Class 5 2200 c.y. $ $
3. Remove concrete curb
and gutter 80 l.f. $ $
4. Type 31 base
Course mixture 8050 sy-in $ $
5. Type 41 wear
course mixture 8050 sy-in $ $
6. Sodding 1200 s.y. $ $
7. Surmountable concrete
curb & gutter 2660 l.f. $ $
8. Density tests 15 each $ $
page 9
Item
No. Item Qty Unit
9. Permanent barricades 72 l.f.
l0. Street sign (complete) 1 each
TOTAL BID "D"
Unit Price Total Price
TOTAL BASE BIDS "A", "B", "C", & "D"
ALTERNATE BID "C" STORM SEWER
1. 12" Dual-Wall corrugated
polyethylene pipe 155 1. f .
2. 15" Dual-Wall corrugated
polyethylene pipe 135 l , f .
3. 24" Dual-Wall corrugated
polyethylene pipe 150.5 1, f .
4. 24" polyethylene pipe
flared end section 3 each $
TOTAL ALTERNATE BID "C"
Subcontractors to be used in the work:
Name Address
Name Address
Name Address
A certified check, bid bond or cashier's check in the amount of
Dollars ($ ) , drawn to the
order of the City Treasurer, city of Albertville, Minnesota, is
page 10
attached hereto, with the understanding that if this proposal
is accepted and the undersigned refuse, fail or neglect to
execute a contract and furnish said bond within ten days of the
date of acceptance of this proposal, it is understood and
agreed between the city of Albertville, Minnesota and
that
Rolla rs ($ ), same being the amount of bid
security above mentioned, shall be the liquidated damages
occasioned by such failure, refusal, or neglect and that
thereupon, said City Treasurer may realize on said bid security
and use the proceeds in payment of said damages, and the City
award such bid to the next lowest responsible bidder; and upon
further understanding that said bid security will be promptly
returned upon the rejection of this proposal or the signing of
a contract and furnishing of the bond.
If this proposal is accepted, the bidder agrees to commence
work and to complete all work according to the schedule in the
special provisions.
This proposal is submitted after careful study of the plans and
specif ications and from a personal knowledge of the conditions,
both surface and subsoil at the various sites, which knowledge
was obtained from the undersigned's own sources of information
and not from any official or employee of the City.
The undersigned does declare this proposal is made without
improper connection with any other person or persons making a
proposal on this same contract and is in all respects fair and
without collusion or fraud and the undersigned does further
declare that no person or persons acting in any official
capacity for the City is directly or indirectly interested .in
the proposal herein or in the supplies of works to which it
relates or in any portion of the profits thereof.
It is understood and agreed that this proposal cannot be
withdrawn within thirty (30) days after the opening of bids
without the consent of the City and that the City has the right
to accept the lowest responsible bidder or reject any or all
proposals.
ADDENDUM RECEIPT
The receipt of the following Addenda to the Specifications is
acknowledged.
Addendum No. Date
II
Addendum No. Date
Addendum No. Date
page 11
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CONTRACT AGREEMENT
' E-9201-G
' THIS AGREEMENT, made and entered into as of the day of
1992, by and between herein-
' after called the Contractor, and the City of Albertville, Minnesota,
hereinafter called the Owner.
' WITNESSETH: That the Contractor and the Owner for the considerations
hereinafter agree as follows:
ARTICLE 1 SCOPE OF WORK
' The Contractor shall furnish all of the material and perform all of
the work shown on the plans and drawings as described in the
' specifications entitled, 1992-3 IMPROVEMENT PROJECT, (UTILITIES AND
STREET IMPROVEMENTS, PSYK'S FIFTH ADDITION), ALBERTVILLE, MINNESOTA
as prepared by Meyer-Rohlin, Inc., Engineers and Land Surveyors, 1111
Highway 25 North, Buffalo, Minnesota, acting as and in these contract
documents entitled "Engineer".
ARTICLE 2 COMPLETION OF WORK
' The Contractor shall complete the work as specified within the
specifications.
' ARTICLE 3 THE CONTRACT SUM
' The Owner agrees to pay and the Contractor agrees to receive and
accept payment in accordance with the unit prices bid and based upon
the estimated quantities for the combined estimated sum as set forth
in the accepted Contractors Proposal on file with the Owner, to be
DOLLARS ($ ),
ARTICLE 4 CONTRACT DOCUMENTS
The Contract Documents shall consist of the following component
parts:
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1) The Accepted Proposal
3) Instructions to Bidders
5) Special Provisions
7 ) Concrete Curb Specs
9) Tie Sheet
11) This Document
2) Request for Bids
4) General Conditions
6) Street Construction Specs
8) Standard Utilities Specs
10) Drawings E-9201-G (7 sheets)
This Instrument, together with the documents above mentioned, form
the Contract, and they are as fully a part of the Contract as if
hereto attached or herein repeated.
ARTICLE 5 PAYMENTS
The Contractor shall submit monthly requests for payment to the
Engineer, as per specifications, including lien waivers, requesting
payment for all materials, and labor expended for the payment
period. The Ov~mer will retain five (5%) percent of the amount of
the payment until full completion of the Contract.
IN WITNESS WI~REOF, the parties hereto have caused this
instrument to be executed in three counterparts as of the day and
year first above written.
BY
BY
CITY OF ALBERTVILLE, MIV
BY
James Walsh, Mayor
Linda Houghton, Clerk
page 14
GENERAL CONDITIONS
TABLE OF CONTENTS
ARTICLE
1. In General
2. .Definitions
3. Execution, Correlation, and Intent of Documents
4. Drawings and Specifications
5. Performance Bond
6. Insurance
7. Permits, Regulations and Licenses
8. Engineer's Status
9...Quantity Revisions and Deletions
10. Changes and Extra Work
11. Inspection and Testing
12. Disposition of Defective Material
13. Contractor's Responsibility for Materials
14. Subcontractors
15. Prosecution of Work
16. Character of Work and Materials
17. Supervision and Character of Workmen
18. Protection of Property and Restoration
19. Traffic and Utility Controls
20. Right of the Owner to do the Work
21. Right of the Owner to Declare Contractor in Default
22. Partial Default
23. Indemnity
24. Royalties, Patents and Trademarks
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General Conditions Table~of Contents - Continued
ARTICLE
25. Assignment
26. Guarantee
27. Failure to Replace Defective Parts
28. Suspension and Resumption of Work
29. Delays and Extension of Time
30. Failure to Complete Work on Time
31. Protection and/or Restoration of Survey Monuments
32. Discrimination on Account of Race, Creed, or Color
Prohibited in Contract
33. .Scope of Payment
34. Application of Payments
35. Payments to Contractors
36. Progress Reports to Engineers
37. Acceptance of Work
38. Project Site Cleanliness
39. Dust Control and Water Use
40. Erosion Control
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1. IN GENERAL
GENERAL CONDITIONS
The standard form of the American Institute of Architects, entitled "The
General Conditions of the Contract", and containing Articles 1 to 14 inclusive,
is a part of these specifications, except that the following General conditions
shall take precedence over and modify any statements of the "General Conditions
of the Contract" and shall be used in connection with them as part of the
Contract Documents. A copy of these General Conditions of the Contract is on
file in the Engineer's Offices and is subject to inspection by this Contractor.
Unfamiliarity with the terms of these General Conditions of the Contract will
does not relieve this Contractor of the terms contained therein. The word
"Architect" in the General Conditions of the Contract shall be construed to
mean the same as "Engineer" in this specification.
' 2. DEFINITIONS
For the purpose of this contract and specifications, the following words are to
' be used in accordance with these definitions. If pronouns are used in place of
the word, the same interpretation shall apply.
n
OWNER - is City of _ Albertville , acting personally or through
its authorized representative.
ENGINEER - refers to Meyer-Rohlin, Inc., Engineers and Land Surveyors,
1111 Highway 25 North, Buffalo, Minnesota, acting personally or through
its authorized representative.
CONTRACTOR - is the individual, firm or corporation with whom the Owner
contracts and awards the work.
SUBO~NTRACTOR - is the individual, firm or corporation having a direct
contract with the Contractor, to furnish work according to the plans and
specifications.
CONTRACT DOCUMENTS - consist of the agreement, the general conditions of
the contract, and the drawings and the specifications, including all
modifications thereto incorporated in the documents before their
execution. These form the Contract.
WORK - includes labor and/or materials, equipment, transportation, or
other facilities necessary to complete the Contract.
SPECIFICATION - refers to the directions, provision, and requirements
contained herein pertaining to the method and manner of performance of the
work, and the qualities and quantities of materials to be furnished under
the Contract.
General Conditions, Page 1
BIDDER - is any individual, firm, or corporation offering on a form
furnished by the Engineer, to perform the work contemplated in the
drawings and specifications.
PROPOSAL - is the written offer of the bidder on a form furnished by the
Engineer, properly signed and guaranteed, to perform the contemplated
work.
PLANS - are all approved drawings, or reproductions of such drawings,
pertaining to the work provided in the Contract.
PROPOSAL GC~RANTEE - is the security designated in the proposal and
furnished by the bidder as a guarantee of good faith to enter into a
contract with the Owner for performing the work should it be awarded to
him.
PERFORMANCE BOND - is the approved form of security furnished by the
Contractor and his surety or sureties guarantying the faithful performance
of the Contract and the payment of all obligations arising thereunder.
INSPECTOR - is a representative of the Engineer who is authorized to make
a detailed inspection of any and all portions of the work performed and
materials incorporated in the work.
3. EXECUTION, CORRELATION, AND INTENT OF DOCCTNIENTS
The Contract Documents shall be signed in duplicate by the Owner and the
Contractor. In case the Owner and the Contractor fail to sign the general
conditions, drawings, or specifications, the Engineer shall identify them.
The Contract Documents are complementary and what is called for by any one
shall be binding as though called for by all, and the Contractor shall
rigorously abide by all their provisions. The intentions of the documents is
to include all labor, tools, materials or equipment, supplies, and
transportation necessary for the proper execution of the work. Any
disagreement between them shall be determined by the Engineer, and his decision
shall be final. Whenever the phrase "or equal" shall appear in the contract
documents, it shall be construed to mean "or equal" in the opinion of the
Engineer.
If any disagreement appears between drawings, specifications, or proposal form;
the bidder shall request in writing a clarification from the Engineer. This
will enable the Engineer to notify all interested parties of the discrepancy
and its clarification.
4. DRAWINGS AND SPECIFICATIONS
All drawings, specifications, or copies of same furnished by the Engineer
remain as his property and, with the execution of the signed contract document
set, shall be returned upon request at completion of the work. They must not
be used for work other than this Contract.
General Conditions, Page 2
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' The Engineer will furnish, free of charge, all copies of drawings and
specifications reasonably necessary for the prosecution of the work. One set
of drawings shall be returned to the Engineer upon completion of the work as
' "as constructed" drawings, and shall be accurately marked with any and all
alterations and dimensions that deviate from the printed drawings and details.
' The Contractor shall at all times keep a copy of the drawings and
specifications at the work site and the Engineer shall have access to them at
all times.
The Engineer shall further furnish such additional drawings or instructions as
are necessary for the proper execution of the work. All such drawings and
instructions shall not be inconsistent with the Contract Documents, shall be
' true developments thereof, and shall be reasonably inferable therefrom. In
using the drawings and specifications, the specifications shall take precedence
over the drawings. Figure dimensions shall be followed in preference to scaled
dimensions, and large scale drawings. In any case, it shall be the
' Contractor's responsibility to have omissions or discrepancies in the drawings
or specifications clarified before ordering material or executing the work
called for in the Contract. The Contractor shall verify all dimensions
affecting the installation.
5. PERFORMANCE BOND
' Prior to the signing of the Contract, the Contractor shall be required to
furnish the Owner with a performance bond from a surety acceptable to the
Owner, in the form required by law, in an amount equal to the full amount of
the Contract based on the lump sum bid or the anticipated quantities and unit
prices as determined by the Engineer. This bond shall guarantee the proper
' execution and completion of the work and shall further guarantee the prompt
payment of all persons or firms furnishing labor, tools, material, equipment,
and supplies for the work.
' This bond shall be kept effective and in full force for one (1) year after
completion and acceptance of the work. The bond shall serve as a guarantee of
the function and workmanship of the work. This bond shall make the
' Contractor's sureties reponsible for the satisfaction of the work against
faulty workmanship or defective materials. Final acceptance of the work shall
not relieve the sureties of responsibilites for faulty workmanship for work
' through collusion or done with inferior materials for a period of one (1) year
after the final acceptance. Premiums shall be paid by the Contractor.
' 6. INSURANCE
The Contractor shall obtain and maintain in full force for the duration of the
' Contract the insurance designated below. Premiums shall be paid by the
Contractor.
General Conditions, Page 3
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a) Workmen's Compensation
The Contractor shall take out and maintain during the life of the
contract Workmen's Compensation Insurance for all of his employees
employed at the work site. If any of his employees are engaged in
hazardous work not covered by Workmen's Compensation Insurance, the
Contractor shall provide adequate protection from Employer's
Liability Insurance for protection of employees not otherwise
protected.
b) Public Liability and Property Damage Insurance
The Contractor shall take out and maintain during the life of the
contract Public Liability Insurance and Property Damage Insurance to
protect him from claims arising out of public liability and property
damage, for personal injury including death, claims for property
damages which may arise out of work, or by one directly or indirectly
employed by the Contractor.
Amount of Insurance shall be as follows: Public Liability Insurance
shall not be less the Two Hundred Thousand ($200,000) Dollars for
injuries including accidental death, to one person, subject to the
same limit for each person, not less than Four Hundred Thousand
($400,000) Dollars for one accident. Property Damage shall be for
Fifty Thousand ($50,000) Dollars for each accident but not less than
One Hundred Thousand ($100,000) Dollars aggregate.
c) Fire Insurance
The Contractor shall carry full insurance against loss by fire and
wind damage upon all materials in place or stopped at the site for
installation. This provision does not exclude material partially
paid for by the Owner. This insurance shall be for the full
insurable value of the material and shall be kept in full force until
final acceptance and payment of the work by the Owner.
d) Automobile Insurance
The Contractor shall take out and maintain during the life of the
contract Automobile Public Liability Insurance in the amount of not
less than $200,000 and $400,000 property damage liability.
If any part of the work is under subcontract, similar insurance shall
be provided by or in behalf of the subcontractors to cover all work
done under their operations.
All insurance shall be placed with companies acceptable to and
approved by the Owner.
The Contractor shall submit copies of insurance coverage with the
Owner for filing.
If any section of the work details special hazards, the Contractor
shall provide riders to the Public Liability Property Damage
Insurance to provide protection from these special hazards.
General Conditions, Page 4
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7. PERMITS, REGULATIONS AND LICENCES
The Contractor shall obtain at his own expense all permits and licenses
necessary for the prosecution of the work where. such items are directly
applicable to the performance of the work. Permits, licenses, and easements
for permanent structures and permanent changes in existing facilities shall be
secured by the Owner.
The Contractor shall be familiar with and conform to all local, state, and
federal codes, regulations, laws, and ordinances applicable to the work,
affecting those engaged or employed in the work, or the equipment or materials
used in or upon the improvement. The provisions of such codes, regulations,
laws, and ordinances are deemed to be a part of these specifications and the
Contractor will be bound by provisions thereof.
The Contractor shall and also by surety agree to indemnify and save harmless
the Owner and all of its officers and agents against any claim or liability
arising from or based on the violation of any such code, regulation, law or
ordinance, whether by himself, his employees or subcontractors.
If any work drawn or specified or any direction of the Engineer or inspector is
contrary to such codes, regulations, laws or ordinances, the Contractor shall
so notify the Engineer for proper revisions and alterations.
8. ENGINEER`S STATUS
The Engineer shall have the authority to stop work when necessary to insure the
proper execution of the contract. He shall have the authority to reject all
work and materials which do not conform to the contract documents and to decide
questions which arise in the execution of the work.
Any work not specifically specified on the plans, but which may be fairly
implied, or understood, as included in the contract, shall be done by~the
Contractor without extra charge, and the Engineer shall be permitted to make
such corrections and interpretations as may be deemed necessary for the
fulfillment to the extent of the plans and specifications. In the case of any
discrepancy occuring between the plans and specifications, the decision of the
Engineer is final.
' The Engineer shall present his decisions in writing on all claims of the Owner
or the Cortractor and all other matters relating to the execution and progress
of the work or interpretation of the contract documents.
' 9. QUANTITY REVISIONS AND DELETIONS
' The Engineer is given the right to increase, decrease or delete arty or all of
the items specified in the Plans, Proposal and Contract.
Such revisions shall in no way invalidate the Contract.
General Conditions, Page 5
The Owner through the Engineer reserves the right to terminate the Contract as
it applies to the item or items in question and to make such arrangements as he
may deem necessary to complete such item or items of work.
No allowance for anticipated profits will be made.
10. CHANGES AND EXTRA WORK
The Engineer or Owner, without nullifying the Contract, may order contract
changes, deletions, and extra work done. If these changes or extra work are of
such a nature as would affect the contract price, an adjustment will be made
by:
a) Agreement between Owner, Engineer and Contractor of a lump sum for
the work.
b) By contractual unit prices.
c) By cost plus a percentage.
All work changes involving adjustment of the contract price shall be in
writing.
11. INSPECTION AND TESTING
The Engineer and his representatives shall at all times be provided with proper
facilities for the access and inspection of the work wherever it is in
preparation or progress.
Upon suspecting that the materials furnished, or the work performed by the
Contractor fail to fulfill the requirements of the contract, an inspector on
the project site has the authority to reject materials or suspend work until
such matter can be referred to the Engineer and a decision rendered. No advice
which the inspector may give the Contractor shall be construed as binding upon
the Owner nor will such advice release the Contractor from the fulfillment of
the terms of the contract.
All materials furnished by the Contractor are subject, at the discretion of the
Engineer, to inspection and/or testing by methods acceptable to the Engineer
and at the expense of the Contractor.
If any local, state and federal codes, regulations, laws or ordinances require
any work to be specifically tested and approved and if the specifications or
Engineers instructions require special testing or approval, the Contractor
shall give the Engineer timely notice of its readiness for the inspection. If
any work shall be covered up without approval or consent of the Engineer, it
must, if required by the Engineer, be uncovered for examination at the
Contractor's expense.
General Conditions, Page 6
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' 12. DISPOSITION OF DEFECTIVE MATERIAL
All material found during the process of inspecting and testing to be
' defective, or defective material encountered at any time during the progress of
the work, will be rejected by the Engineer, and the Contractor shall promptly
remove all such material from the site.
' 13. CONTRACTOR'S REPONSIBILITY FOR MATERIALS
a) Material Furnished by Contractor
The Contractor shall be responsible for all material furnished by him
' and he shall replace at his own expense all such material that is
found to be defective in manufacture.or that has beccme damaged in
handling after delivery by the manufacturer. Phis shall include the
furnishing of all material and labor required for the replacement of
installed material discovered defective prior to the final acceptance
of work .
' b) Material Furnished by the Owner
The Contractor's responsibility for the material furnished~by the
' Owner shall begin at the point of delivery by the manufacturer, .or
Owner, and upon acceptance of material by the Contractor. The
Contractor shall examine all material funished by the Owner at the
time and place of delivery, and shall reject all defective material.
c) Replacement of Damaged Material
.Any material furnished by the Owner that becomes damaged after
acceptance by the Contractor shall be replaced by the Contractor at
-his own expense.
' d) Responsibility for Safe Storage
The Contractor shall be reponsible for the safe storage of material
furnished by or to him, accepted by him and intended for the work,
until it has been incorporated in the completed project. The
interior of all pipe, fittings and other accessories shall be kept
' free from dirt and foreign matter at all times.
14'. SUBCONTRACTORS
All subcontractors shall be proven qualified to the satisfaction of the
Engineer, and any subcontractor unsatisfactory to the Owner or Engineer shall
not be employed on the work.
General Conditions, Page 7
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Subcontractors shall have no contractual relations with the Owner, and shall be
considered as an employee of the Contractor by the Engineer. The Contractor
shall assume complete responsibility for the acts and omissions of his
subcontractors or any persons directly or indirectly employed by them.
All subcontractors to be used on the project must be indicated on the bid
proposal form. No other subcontractors may be used on the project other than
those listed on the bid proposal without the written consent of the Engineer.
No more than 50~ of the contract may be sublet to subcontractors without the
written consent of the Engineer.
15. PROSECUTION OF WORK
All dealings of the Owner will be with the Contractor and no work shall be
started until the contract has been executed and all insurance certificates and
performance bonds are received by the Owner.
The Contractor shall submit to the Engineer, at such times reasonably
requested, schedules indicating the order and manner in which the Contractor
intends to carry out the terms of the contract. This schedule is to include
dates at which time certain parts of the work will begin and be completed. If
deemed necessary by the Engineer, he shall have the right to change such
schedule of operation as required.
The work shall be prosecuted in such a manner as to insure its completion
within the date specified, and the Engineer shall have the right to require the
Contractor to place in operation such additional force and equipment as is
deemed necessary.
16. CHARACTER OF WORK AND MATERIALS
All work done shall be first class only, the best possible at the present state
of the arts. Botched or slovenly work shall not be permitted. All workmen
shall be experienced and qualified to perform the work assigned.
Unless otherwise specified, all materials used in the work shall be new, and of
the designated quality or superior.
17. SUPERVISION OF CHARACTER OF WORKMEN
The Contractor shall keep on his work during its progress and completion a
competent superintendent and assistants as considered necessary by the Engineer
for proper prosecution of the work. The superintendent shall not be changed
except with the consent of the Engineer unless the superintendent proves
unsatisfactory to the Contractor and ceases to be in his employ. The
superintendent shall represent the Contractor in his absence and directions
given to him by the Engineer shall be as binding as given to the Contractor.
General Conditions, Page 8
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Competent labor shall be employed on this work. The foreman directing the work
shall be competent, reliable and ensure that proper facilities are available
for the inspection and testing of materials and work by the Engineer or his
representative.
The Engineer may demand in writing the dismissal of any employees of the
Contractor found to be negligent or careless in the performance of his duties.
18. PROTECTION OF PROPERTY AND RESTORATION
Where the work passes over or through private property, the Owner will secure
right-of-way or easement. The Contractor shall not receive any extra
compensation or be entitled to any extras because of delay on the part of the
Owner in obtaining right-of-way or easement.
The Contractor shall not enter upon private property for any purpose without
' having previously obtained permission from the Owner. The Contractor shall be
responsible for the preservation of, and shall use every precaution to prevent
damage to all trees, shrubbery, plants, lawns, fences, culverts, bridges,
pavements, driveways, sidewalks, etc.; all overhead lines or appurtenances
thereof; and all other public or private property along or adjacent to the
work.
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The Contractor shall notify the proper representatives of any public utility,
corporation, and company or individual, not less than forty-eight hours in
advance of any work which might damage or interfere with the operation of their
or his property along or adjacent to the work. The Contractor shall be
reponsible for all damages or injury to property of any character resulting
from any act, omission, neglect or misconduct in the manner or method of
executing the work, or due to his non-execution of the work, or at any time due
to defective work or materials. He shall restore, or have restored at his awn
cost and expense, such property to a condition similar or equal to that
existing before such damage or injury was done, by repairing, rebuilding; or
otherwise restoring as may be directed, or he shall make good such damage fran
injury in a manner acceptable to the Owner or the Engineer. In case of failure
on the part of the Contractor to restore such property as may be determined
necessary, and the cost thereof will be deducted fran any monies due to the
Contractor under this contract, if not so deducted, the Contractor will be
obligated to forthwith reimburse the Owner for the cost thereof.
The Contractor shall provide at his own cost and expense all methods for
adequately draining the work and shall assume full responsibility and liability
for damage to any persons or property resulting fran such damage. No separate
compensation will be paid for sub-drains, or other methods of draining, but the
cost thereof shall be merged with such contract pay items as are provided in
the proposal and contract.
No tress shall be cut except upon the specific authority of the Engineer.
Trees adjacent to the work shall be protected fran all damage by the
construction operations.
General Conditions, Page 9
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Prior to construction, the Contractor shall obtain field locations or other
assistance as may be required to determine the existence and location of gas
main and other private utilities as well as public utilities of the Village,
City, County or State which may be underground or overhead within street and
highway right-of-way or within easements and which may be interfered with under
this contract. Existing underground, surface, or overhead structures are not
necessarily shown on the plans, and those shown are only approximately correct
and no reponsibility is assumed by the Owner or the Engineer for the accuracy
of location. The Contractor shall make such investigations as are necessary to
determine the extent to which existing structures may interfere with the work
contemplated under this contract. The sizes, locations, and depths of such
structures as are shown on the plans and profiles are only approximately
correct and the Contractor shall satisfy himself as to the accuracy of the
information given. The Contractor shall not claim or be entitled to receive
compensation for any damages sustained by reason of the inaccuracy or the
omission of any of the information given on the drawings, relative to the
surface, overhead, or underground structures or by reason of his failure to
properly protect and to maintain structures.
The Contractor is to exercise extreme care in crossing or working adjacent to
all utilities and shall be responsible to protect and maintain their operation
during the time the-work is in progress. The Contractor shall restore, at his
awn expense, any public structures such as watermains, water connections and
appurtenances, sewers, manholes, catch basins and sewer connections which are
damaged or injured in any way by his acts.
The Owner shall be idemnified and saved harmless from any suit or expense claim
brought for or on account of any damage, maintenance, removal and/or
replacement, or relocation of mains, conduits, pipes, poles, wires, cables or
other such structures of private utility firms or corporations, whether
underground or overhead, that may be caused or required by the Contractor
during the time the work is in progress. However, in cases where the
alignment, as shown on the plans, coincides with the existing location of
either an overhead or undergound privately owned utility (installed and located
in accordance with a permit issued by the Village or City) so that, in the
opinion of the Engineer the relocation of said utility is required to complete
the installation, the Owner shall provide for such relocation.
19. TRAFFIC AND UTILITY CONTROLS
Construction shall be conducted in a manner to cause the least interruption to
traffic. Where traffic must cross the construction, the Contractor shall
provide suitable crossings at street intersections and driveways. The
Contractor shall post, where directed by the Engineer, suitable signs
indicating that a street is closed and necessary detour signs for the proper
maintenance of traffic. Hydrants under pressure, valve pit covers, valve
boxes, curb stop boxes, fire and police call boxes, or other utility controls
shall be left unobstructed and accessible during the construction period. No
two consecutive intersections shall be impassable at any time.
General Conditions, Page 10
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' 20. RIGHT OF THE OWNER TO DO THE WORK '
If the Contractor should neglect to prosecute the work properly or fail to
' perform any provision of the contract, the Owner, after three days written
notice to the Contractor, may, without prejudice to any other remedy the Owner
.may have, make good such deficiences and may deduct the cost thereof from the
payment then or thereafter due to the Contractor, provided, however, that the
Engineer shall have approved both such actions and the amount charged to the
Contractor.
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21. RIGHT OF THE OWNER TO DECLARE CONTRACTOR IN DEFAULT
If the Contractor should be adjudged as bankrupt, or if he should make a
general assignment for the benefit of the creditors, or if a receiver should be
appointed on account of his insolvency, or if he should persistently or
repeatedly refuse or should fail, except in cases for which extension of time
is provided, to supply enough properly skilled workmen or proper materials, or
if he should fail to make prompt payment to subcontractors for labor or
materials or should persistently disregard laws, ordinances, or the
instructions of the Engineer, or to otherwi;>e be guilty of a substantial
violation of any provision of the Contractt, then the Owner, upon the
certification of the Engineer that sufficient. cause exists to justify such
action, may without prejudice to any other suit: or remedy and after giving the
Contractor and the surety on his bond seven days written notice, terminate the
employment of the Contractor and take possession of the premises and all
materials, tools and appliances thereon and finish the work by whatever method
the Owner may deem expedient. In such case, the Contractor shall riot be
entitled to receive any further payment until the work is finished. If the
unpaid balance of the contract price shall exceed the expense of finishing the
work, including compensation for additional managerial and administrative
services, such excess shall be paid to the Coni'~ractor. If such expense shall
exceed such unpaid balance, the Contractor shall pay the difference to the
Owner.
22. PARTIAL DEFAULT
In case the Owner shall declare the
work only, the Contractor shall
performing the remainder of the work
Contract, and shall in no way hinder
persons wham the Owner may engage
Contractor was declared in default.
The provisions of
default as to the
partial default,
completion of the
default only such
previouly used by
Contractor in default as to a part of the
discontinue such part, shall continue
in strict conformity with the terms of the
or interfere with any other Contractors or
to complete the work as to which the
the clauses herein relating to declaring the Contractor in
entire work shall be equally applicable to a declaration of
except that the Owner shall!. be entitled to utilize for
part of the work as to which the Contractor was declared in
plant, materials, equipment, tools and supplies as had been
the Contractor on such part.
General Conditions, Page 11
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23. INDEMNITY
The Contractor shall hold harmless from the indemnity the Owner against all
claims, suits, actions, costs, counsel fees, expenses, damages, judgements or
decrees by reason of any person or persons or property being damaged or injured
by the Contractor or by any of his subcontractors, in any capacity during the
progress of the work whether by negligence or otherwise.
24. ROYALTIES, PATENTS AND TRADE
The contract price shall, without exception include compensation for all
royalties and costs arising from patents and/or trademarks in any way included
in the work. The Contractor shall defend all suits or claims of infringement
and shall save the Owner harmless from loss thereof.
25. ASSIGI~IT
Neither party to the contract shall assign the contract in whole or in part
without the written consent of the other, nor shall the Contractor assign any
monies due to him without the previous written consent of the Engineer.
26. GUARANTEE
The Contractor shall hold himself responsible for any and all defects that may
develop in any part of the entire work or installation furnished by him, and
upon receipt of written notice from the Engineer, shall immediately replace and
make good, without expense to the Owner, any faulty work or parts and damage
done by reason of the same, during a period of one (1) year from the date of
final accepance of the work or installation, except when a specific guarantee
for another period is specified.
'27. FAILURE TO REPLACE DEFECTIVE PARTS
Should the Contractor fail to make good defective parts within a period of
thiry (30) days of notification of such defects, the Owner, after- written
notice has been given the Contractor, may replace those parts charging the
expense of such replacement to the Contractor.
28. SUSPENSION AND RESUMPTION OF 4~RK
The Engineer shall have the authority to suspend the Contractor's operations,
wholly or in part, for such period of time as he may deem necessary because of
unsuitable weather or other conditions which he considers unfavorable for the
prosecution of the work, or because of the noncompletion of the work being done
under other contracts on the same construction; or from such time as may be
necessary because of failure of the Contractor to comply with the provision of
the contract.
General Conditions, Page 12
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No operations which have been suspended by a "Suspension of Work Order" shall
be resumed until the Engineer has issued a "Resumption of Work Order". The
order to resume operations shall be issued when in the opinion of the Engineer,
the conditions which justified the suspension no longer exist. This order
shall be in writing and will state the reason for ordering such resumption, the
effective date, and the operation to be resumed.
If it should become necessary to suspend operations for any indefinite period,
the Contractor shall, before leaving the project, store all materials and
equipment in such a manner as will not obstruct or impede the Owner. He shall
take every precaution to prevent damage to or deterioration of the work
performed, shall provide suitable drainage of the area, and shall erect
temporary structures where necessary.
29. DELAYS AND EX'I~TSION OF TIME
If the Contractor is delayed at any time in the progress of the work due to an
act or neglect of the Owner or the Engineer or any employee of either, or by
any other Contractor employed by the Owner, or by changes ordered in the work
by the Engineer or the Owner, or other causes beyond the control of the
Contractor that the Engineer deems to justify the delay, then the time of
completion shall be extended for a reasonable time period as the owner may
decide and the decision of the Owner is final. No such extension will be made
for delay unless such request for extension is submitted by the Contractor, in
writing, within seven (7) days after the period of delay. The request for time
extension must include causes and dates of delay.
30. FAILURE TO COMPLETE WORK ON TIME
Should the Contractor fail to complete the work on or before the original date
set forth for completion in the Contract, or. on or before the corrected date as
granted by extension of time for completion, the Owner may permit the
Contractor to proceed, and in such case, there shall be deducted from any
monies due or that may become due the Contractor the sum of $200.00 per day for
each and every calendar day, exclusive of Sundays and holidays, that the work
shall remain uncompleted. This sum shall be considered and treated, not as a
penalty, but as the cost of field and office Engineering and Inspections and
Liquidated Damages.
' Permitting the Contractor to continue and finish the work or any part of it
after the time fixed for its completion, or after date to which the time of
' completion may have been extended, shall in no way operate as a waiver on the
part of the Owner, or as a waiver of any of his rights under the Contract.
Neither by the taking over of the work by the Owner nor by the termination of
' the contract shall the Owner forfeit the right to recover liquidated damages
from the Contractor or his surety for failure to complete the Contract.
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General Conditions, Page 13
31. PROTECTION AND/OR RESTORATION OF SURVERY MONUMENTS
It is the reponsibility of the Contractor to protect and leave undisturbed
those markers or monuments set for the subdivision of land, unless those
markers must be disturbed in order to execute the Contract. In this event, the
Contractor will notify the Engineer prior to such dislocation in order for the
Engineer to tie in the marker to make possible for relocation after
construction is completed. If the Contractor shall be negligent in this
matter, it shall be his reponsibility to restore all monuments to their
respective positions at his own expense.
32. DISCRIMINATION ON ACCOUNT OF RACE, CREED, OR COLOR PROHIBITED BY CON'T'RACT
Every contract for or on behalf of the Owner shall be deemed to contain
provisions by which the Contractor agrees:
a) That, in the hiring of canmon or skilled labor for the performance of any
work, under any Contract, or any subcontract hereunder, no contractor, material
supplier, or vendor, shall, by reason of race, creed, or color discriminate
against the person or persons who are citizens of the United States who are
qualified and available to perform the work to which employment relates.
b) That no Contractor, material supplier, or vendor shall, in any manner,
discriminate against, or intimidate, or prevent the employment of any such
person or persons, or on being hired, prevent, or conspire to prevent, any such
person or persons fran the performance of work under any contract on account of
race, creed or color.
c) Any violation of this section shall be a misdemeanor.
d) That this contract be cancelled or terminated by the Owner, and all money
due, or to become due hereunder, may be forfeited for a second or any
subsequent violation of the terms or conditions of this contract. (Section
181.59 Minnesota Statues).
33. SCOPE OF PAYMENT
The Contractor shall receive and accept the compensation as herein provided, in
full payment for furnishing all materials, labor, tools, equipment, royalties,
fees, insurance, permits, bonds, etc., and for performing all work contemplated
and embraced under the contract, also for all loss or damage arising out of the
nature of the work, or from the action of the elements, until its final
acceptance by the Owner, and for all risks connected with the prosecution of
the work, also for all expenses incurred by, or in consequence of, the
suspension or discontinuance of said prosecution of the work as herein
specified and for completing all of the work embraced in the contract.
General Conditions, Page 14
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The Contractor shall under his contract price furnish and pay for all material
and incidental work, furnish all accessories, and do everything which may be
necessary to carry out the contract in good faith, which contemplates
everything completed in good working order, of good material with accurate
workmanship.
34. APPLICATION FOR PAYMENTS
The Contractor shall submit to the Engineer an application for each payment for
verification of all quantities and claims against the Owner. Applications for
payment shall be made. on forms supplied by the Engineer to indicate quantities
claimed and, if required, receipts or other vouchers shaaing his payments for
materials and labor.
Applications for payment must be submitted for review to the Engineer by the
25th day of the month. The progress report as required under Article 37 of
these General Conditions must accompany the application for payment in order
for the application to be processed.
3 5 . PAYMENTS TO CON`i~ACTORS
Partial payment for the work performed and materials available for
incorporation in the work shall be made on a monthly estimate prepared by the
Contractor and submitted for review to the Engineer by the 25th day of the
month. Five percent of all monies due shall be withheld until final completion
and acceptance of the work. In addition to the percentage withheld, the Owner
shall withhold any such amount as may be necessary to remedy the following:
a) Defective work uncorrected.
b) Failure of Contractor to properly pay for labor, materials, or work of
subcontract completed.
c) Evidence of damage unremedied
After the completion of the project, the Engineer shall prepare a final
estimate of all work performed by the Contractor based on the unit prices and
lump sums pf the proposal together with the Contract. The final estimate will
be submitted to the Contractor for his approval, and upon such approval and
recomr~ndation of the Engineer, final payment will be paid to include any
retained percentages.
The Owner may require from the Contractor evidence proving that all claims
against him by reason of the Contract have been paid; the Owner shall withold a
sufficient s~zm to cover all claims unpaid. The making of progressive payments
shall not be considered in any way an acceptance by the Owner of any of the
work of installation, and the making of such payments shall not relieve the
Contractor of any of the requirements of the Contract Documents.
General Conditions, Page 15
36. PROGRESS REPORTS TO THE ENGINEER
The Contractor .shall prepare and submit to the Engineer, on forms provided by
the Engineer, a project progress report which will provide information relating
to the proper execution of the work within the time allowed by the contract..
The progress report is to indicate the approximate percent completion of the
various major phases of the project in which interim completion dates have been
provided by the Contractor on the bid proposal form.
The project progress report must accompany any application for payment
submitted by the Contractor and both the application for payment and the
progress report must be submitted by the 25th day of the month for the
processing of any claims for that month.
37. ACCEPTANCE OF WORK
The Engineer will make final inspection of the entire project as soon as
practicable after notification by the Contractor that such work is nearing
completion. If such work is not acceptable to the Engineer at the time of his
inspection, he will notify the Contractor in writing as at the particular
defects to be remedied before such work can be accepted. If, within a period
of ten (10) days after such notification, the Contractor has not taken steps to
speedily complete the work as directed, the Engineer may, without further
notice and without in any way impairing the contract, make such other
arrangements as he may deem necessary to have such work completed in a
satisfactory manner. The cost of so completing such work shall be deducted
from any monies due, or which may become due the Contractor on his contract.
38. PRQ7ECT SITE CLEANLINESS
The Contractor shall make every effort to maintain the project site in a clean,
orderly and workmanship manner. No materials or equipment shall be stored or
stockpiled .beyond the right-of-ways provided by the Owner without prior
authorization from the affected property owner.
39. DUST CONTROL AND WATER USE
The Contractor shall maintain excellent dust control on all distrubed surfaces
of the project site.
The Contractor shall make arrangements with the proper City officials for
obtaining any water which may be needed.
General Conditions, Page 16
40. EROSION CONTROL
The Contractor shall provide any necessary erosion control measures for the
proper prosecution of the work. Where materials or debris have washed or
flowed into or have been placed in water courses, ditches, gutters, drains,
catchbasins or elsewhere as~ a result of the Contractors operations, such
material or debris shall be removed and satisfactorily disposed of during
progress of the work. All ditches, channels, waterways, drains, etc. shall be
kept clean.
General Conditions, Page 17
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SPECIAL PROVISIONS
E-9201-G
Page 1
1. Project
2. Foreman ~ Preconstruction
Meeting
3. Construction Staking
4. Utilities
5. Contractor-Engineer-Inspector
Relationship
Page 2
6. Subcontractors
7. Incidental Items
8. Responsibility
9. Connections
10. Trench Compaction
Page 3
11. Testing
Page 4
12. Water Service
13. Conductivity
14. Blocking
15. Watermain Testing
Page 11
21. Materials
22. Manhole Castings
23. Services
24. Compaction Under Services
25. Ties & As-Builts
Page 12
26. Sanitary Sewer Testing
27. Subsurface Exploration
28. Crushed Rock
29. Street Construction
30. Test Rolling
Page 13
31. Water
32. Manhole Adjusting Rings
33. Manhole Adjustment
34. Chimney Seal, Existing MH15
Page 15
35. Signs
36. Free Flow Skimmer
Page 7
16. Bedding
Page 8
17. Fire Hydrant
Page 9
18. Valves and Boxes
Page 10
19. Polyethylene Encasement
20. Water Service Group
Page 16
37. Wetland Vegetation
38. Protection of Existing Utilities
39. Specifications Which Apply
40. Standard Plates
41. Construction Limits
Page 17
42. Shop Drawings
43. Lien Waivers
44. state of MN Withholding Require.
45. Performance Bond
46. Insurance
Page 18
47. Guarantee
48. Alternate Bid
49. Dual-Wall Corrugated Polyethylene
50. Cleanout & Cleanout Manholes
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SPECIAL PROVISIONS
E-9 201-G
1. PROJECT
The project consists of the installation of watermain, sanitary
sewer, storm sewer, sedimentation pond, and streets in Albert-
ville, Minnesota.
The Contractor shall complete the street, utilities and all
restoration, excludin the bituminous wear course, by November 15,
1992. The bituminous wear course shall be paved in the
spring/sunmer of 1993 and shall be completed by July 1, 1993. The
Contractor shall be subject to the provisions of Article 30 of the
General Conditions for failure to meet these completion dates, as
a whole or in part.
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2. FOREMAN AND PRECONSTRUCTION MEETING
Before work is initiated, a preconstruction meeting shall be held
between the Engineer, Contractor, Utility Companies and other
involved parties, if any. The Contractor will present to the
Engineer an estimated schedule for completion of various portions
of the project. The Contractor shall inform the Engineer who the
foreman on the project will be. The foreman shall be on the job at
all times.
The foreman shall be responsible for all phases of the project,
including work done by the General Contractor and the subcon-
tractor. Engineering decisions with regard to the work done by
subcontractors shall go through the General Contractor and
specifically the foreman for the job.
3. CONSTRUCTION STAKING
The Contractor shall give the Engineer at least two (2) working
days notice for any grade and line stakes or inspection that he
requires for proper execution of any phase of:-the project. The
Contractor shall preserve these stakes until the work is
completed.
4. UTILITIES
The Contractor shall be in communication with the respective
utility companies to coordinate their schedule with any location
work that is required.
5. CONTRACTOR-ENGINEER-INSPECTOR RELATIONSHIP
The Engineer will not be responsible for the construction means,
controls, techniques, sequences, procedures, or construction
S.P. 1
safety. All phases of the project shall proceed in accordance with
OSHA safety requirements. The presence of the Engineer or his
agents or employees on the job-site shall not relinquish the
Contractor of this responsibility or hold the Contractor harmless
for the quality of workmanship or defects in materials.
6. SUBCONTRACTORS
All subcontractors that the General will use shall be shown on the
proposal form. Any other subcontractor will not be allowed without
explicit written permission by the Engineer.
The General Contractor shall coordinate all work between his subs
and the Engineer. The Engineer will not correspond directly with
any subcontractor. Any on-site meetings that are held will be
conducted only if the General Contractor's foreman is present.
7. INCIDENTAL ITEMS
Any and all additional items of work or other items that must be
done to fully complete this project shall be incidental to the bid-
items as bid.
8. RESPONSIBILITY
The General Contractor shall be fully responsible for all work
that is performed on this project. It is the General Contractor's
responsibility to see that all specifications and testing
requirements are followed.
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9. CONNECTIONS
All connections to existing lines are incidental. Payment will be
made based upon the fittings and pipe length used.
10. TRENCH COMPACTION
The backfill around and to 12" above the pipe (sanitary sewer and
Ovate rma in ) s ha 11 be c ompac ted by hand t ampe rs . The required
compaction shall be 98% of the standard proctor density. The
trench from a point 12" above the pipe to finished grade shall be
compacted to a minimum of 98% of standard proctor density. All
trenches within roadways and driveways shall be compacted to 100%
of standard proctor density in the upper three (3) feet of the
trench.
All trench areas not conforming with these requirements shall be
excavated and recompacted. The Contractor shall supply the
Engineer at the time of the preconstruction meeting a list of
equipment that will be used for backfillin and compaction
operation. The Engineer reserves the right to shut down work on
the project if this equipment is not utilized during such
backfilling and compaction operations. A maximum 12" lift shall be
S.P. 2
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used. Smaller lifts may be required to obtain the specified
density. If 12" lifts are not utilized, the trench will be
completely re -excavated and recompacted in order to achieve
maximum compaction lifts of 12". The bedding material around the
sanitary sewer and the watermain shall be compacted in maximum 6"
lifts.
11. TESTING
The Contractor shall supply the Engineer with documented test
results by an independent testing laboratory approved by the
Engineer on tests required for the sanitary sewer, storm sewer,
watermain and street. Density tests shall be paid for on a per
test basis. The anticipated number of density tests are shown on
the proposal form. The following procedure shall be followed. No
exceptions shall be made.
An independent testing lab shall test the backfill for the
required density as the backfilling compaction progresses. No
digging down to test densities will be allowed after the
b ackfilling is completed. Therefore, the lab must be present
during backfilling to test the soil while the backfilling is
proceeding. Backfilling, compaction, and density testing on these
trenches is extremely important. For this reason, the trench
testing is shown as a bid item so all contractors are fully aware
of this requirement. Retesting shall not be paid for. All initial
tests on the trenches shall be paid for at the unit bid price. If
the tests fail, it shall be the Contractor's responsibility to pay
for retesting those areas following compaction. All trenches for
watermain, storm sewer, sanitary sewer, and services shall be
tested for the required compaction density in conformance with the
compaction requirements previously stated. The trench shall be
tested at approximately 100-foot intervals at two to three depth
locations, depending on depth. One test shall be taken next to the
pipe, the second shall be taken at two feet below subgrade and at
the midpoint of the trench. Compaction around every manhole and
gate valve shall be the same as for the trenches. Tests shall be
taken at every manhole and gate valve at the three depth locations
as stated above.
It should be noted that the Engineer may change test locations and
depths at his discretion.
It should also be noted that the Engineer may add or delete tests
at his discretion with no change in the unit price.
The Contractor shall be responsible for coordinating his schedule
with the testing firm and all test results shall be documented
with respect to plan stationing, depth and location. Copies of all
tests shall be given to the En ineer at a minimum of once every
week.
S.P. 3
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12. WATER SERVICE
Prior to the shutoff of any water, the Contractor shall notify the '
Joint Powers Water Utility and the affected property owners of
this working schedule. The Contractor shall notify these people 48
hours in advance of the start of work. The work done during this
time shall be done in an efficient manner so that as little
inconvenience as possible is caused.
13. CONDUCTIVITY
Copper straps shall be used on all DIP mechanical joints. Lead
tipped gaskets will not be allowed. A conductivity test shall be ,
performed on all new lines prior to acceptance.
14. BLOCKING
Blocking shall be done with tie rods, concrete blocking or with
blocking procedures approved by the Engineer. All tees, bends,
hydrants, valves and fittings must be blocked. The use of timber ,
thrust blockin shall not be allowed on this project.
A coating shall be applied to tie rods and related pieces. The
coating shall be Royston-Roskote Mastic A-938, Koppers Bitumastic
No. 50, or approved equal.
If blocking is to be done against soil, the soil must be virgin or '
thoroughly compacted soil and the area of soil used to withstand
the above forces must be based upon an allowable soil bearing
pressure of 30 00 pounds per square foot.
If concrete blocking is utilized, all areas to be blocked shall
have a piece of plastic placed over it prior to placing the ,
concrete.
15. WATERMAIN TESTING
The Contractor shall do the following tests according to the
Standard Utilities Specifications, except as modified below.
a. Pressure Test: The pressure test shall be run for 2 hours. (See
leakage test for equipment) No drop in pressure will be
allowed .
b. Leakage Test: The following test equipment shall be required ~
for testing.
Pressure Gauge: shall have a 5-inch diameter face, pressure
range of 0 psi to 200 psi, with maximum calibrations of 1 psi
increments. This is to facilitate an accurate reading for the ,
pressure test.
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Pump: Shall be a centrifugal-type pump with maximum capacity
of 5 gpm. This capacity may be achieved by a valve so placed
.that all water in excess of 5 gpm can be by-passed. This low
capacity pump is required for the leakage test.
Calibrated tank: Shall be of a capacity and design so that a
measured quantity of water can be supplied to the pipe during
the leakage test. A 15-gallon container calibrated to measure
water to the closest 1.0 gallons will be required.
Miscellaneous Equipment: Shall be provided at the discretion
and subject to the approval of the Engineer .
c. Conductivity: This test shall be made with thawing or arc
welding equipment which has the necessary voltmeters and
ampmeters to indicate the results of the test. The test shall
run 5 minutes with a minimum 300-ampere current at a minimum of
30 volts. No electrical test will be permitted through the stem
on either gate valves or butterf ly valves. Electrical tests
shall be allowed only after the pressure and leakage tests have
been completed. The main must be filled with water and the air
expelled before the electrical test.
d. Disinfection: The Contractor shall thoroughly disinfect the
line for a period of 24 hours.
Disinfection shall be done per AWWA C651-86. A copy of this
standard is available upon request. Please note that a bacteri-
ological test(s) is required per AWWA C651-86. This test(s)
shall be paid for at the unit price bid. Should the test(s)
fail, the watermain shall be disinfected again and an
additional bacteriological test taken. This procedure shall be
repeated until the test(s) passes. All additional disinfection
and bacteriological testing shall be at the Contractor's
expense. All other requirements of Section 1020-7.0 of the
Standard Utilities specification shall remain in force.
Procedures for disinfection of watermain with Calcium Hypo-
cholorite tablets:
AWWA Standard C651-86, Disinfection Watermains, contains appli-
cable requirements for this work. Since a preliminary flushing
cannot be performed when using the tablet method, the
pipe-laying crew must take every precaution to see that the
pipe interiors are clean and free from debris and that the
trench is dry and free from seepage water. If the tablets are
attached to the pipe before it is placed into the trench, a
mark will be made on the upper side of the pipe to indicate
tablet placement.
The tablets shall be attached to the upper quadrant of the pipe
with an adhesive such as Permatex No. 1. Place the adhesive on
S.P. 5
the broad side of the tablet and take care not to use excessive
amounts. Pipes shall not be rotated to place tablets in the
lower quadrant after the pipe is installed.
Disinfection shall be a rate of 50 mg/1 as discussed in this
section. ,
The pipe shall be filled at a rate of one (1) foot/second, or
less, making sure that the line is purged of air. The line will
be left for twenty-four (24) hours. to allow the tablets to
dissolve and the disinfection process to take effect. After
twenty-four (24) hours the pipe will be thoroughly flushed and
checked for chlorine residual. A chlorine residual greater than
found in surrounding water system will be cause for further
flushing.
After flushing, and an acceptable level of residual chlorine is
Bete rmined, a bacteria s ample will be taken. This testing will
require an additional twenty-four (24) hours waiting period.
When the bacteria test passes, valves will be opened and '
service tapping, if required, may proceed.
The following table will be used as a guideline only. The table
is based on using calcium hypochlorite tablets that are 65%
available chlorine and 5 grams in size and at a dosage rate of
50 mg/l.
Number of 5-gram Hypochlorite tablets required
for dose of 50 mg/1
Pipe Diameter Length of Pipe Sections, Feet
Inches 13(or less) 18 20 30 40
4 1 1 2 2 3
6 2 3 3 3 6
8 3 4 5 7 10
10 5 7 8 11 15
12 7 10 11 16 21
16 12 17 20 28 38
One tablet provides 3.25g available chlorine based on 65%
availability of chlorine;
any portion of tablets rounded
to '
next higher number.
NOTE: It is quite apparent that as pipe diameters and len gth
increase that another form of disinfection must be used. As
weather permits, chlorination by the gaseous method must be
emp 1 oyed . '
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S.P. 6
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e. Operational Inspection: At the completion of the project, the
' Joint Powers Water Board's representative and the Contractor
shall operate all valves, hydrants, and water service to
ascertain that the entire facility is in good working order;
that all valve boxes are centered and valves are opened; that
all hydrants operate and drain properly; and that all curb
boxes are plumb and centered; and that water is available at
all curb stops.
16. BEDDING
a. All sanitary sewer mains and services shall be bedded
according to detail 2.006B. The bedding material shall conform
to the requirements of Section 1110-6.1 of the Standard
' Utilities Specification.
b. The water pipe bedding shall be granular bedding. The fill
material around the pipe (as shown on the detail sheet) shall
be less than one inch in diameter and shall also be free to
any organic material or foreign objects.
' This material shall be graded aggregate product which all
passes a one-inch sieve and not more than 10% of which will
pass a #200 sieve. Existing material on site may be used if it
' meets these specifications.
Unless otherwise specified, bedding and encasement shall be
"Class B" Modified. Bedding and encasement material shall be
placed and shaped to fit the lower 60% of the pipe breadth to
three inches (3") minimum thickness bottom and sides and over
the pipe below an elevation one inch (1") above the top of the
' pipe, after pipe installation, for protection of the pipe and
to assure proper filling of voids or through consolidation of
b ackf i 11 .
The pipe bedding and encasement zone shall be described as
that portion of the trench which is below an elevation one
inch (1") over the top of the pipe. Above this zone, the
placement of material containing stones, boulders, chunks,
etc. greater than six (6") inches in any dimension shall not
be allowed.
' c. Storm sewer pipe bedding shall be ordinary bedding consisting
of natural, on-site soils, except in cases where the Engineer
directs otherwise. The fill material around the pipe (as shown
on the detail sheet) shall be less than 1 inch in diameter and
also be free of any organic material or foreign objects.
ALTERNATE BID: The bedding on the Dual-Wall corrugated
polyethylene pipe shall be granular bedding, conforming to the
requirements of Section 1110-6.1 of the Standard Utilities
Specification. The pipe shall be bedded in accordance to
S.P. 7
detail 3.006, except the bedding shall extend a minimum of 6
inches below the pipe and a minimum of 12 inches around the ,
sides and the top of the pipe.
A mechanical hand tamping machine must be used around all
water, sanitary sewer and storm sewer pipe to compact the
bedding and initial fill.
17. FIRE HYDRANT ,
The fire hydrant to be installed shall be a Waterous Model WB67,
conforming to the requirements of the Standard Utilities
Specification.
(a) Hydrants shall be non-jacket type hydrant for a depth of
cover of 7.5 feet to the top of the branch pipe. '
(b) Hydrants shall be compression type, opening against pressure
and closing with pressure. Main valve shall be sealed with
"O" ring type seal. '
(c) Hydrants shall open to the left.
(d) The hydrant drain mechanism shall be corrosion-resistant and
removable from the top of the hydrant.
(e) The operating thread shall be lubricated and protected from
water and moisture by the use of rubber "O" rings.
(f) The upper threaded area of the operating nut shall be
provided with either a lubricant reservoir or extra "O"
ring(s) to maintain lubricant in this area.
,
(g) Hydrant pipe connections shall be 6" mechanical joint for 5"
nominal hydrant valve opening.
(h) Hydrants shall be fitted with two 22" hose nozzles (National
Standard Thread) and one 42" steamer nozzle Waterous No.
TP40524 (National Standard Thread). Nozzle caps shall be
chained to the hydrant and have a No. 5 pentagon size as the '
operating nut, flat to point = 12".
(i) Hydrant bonnet and top section above ground level shall be
primed and painted red.
(j) Each hydrant shall have attached or stamped upon it the size
of the valve opening, the cover depth, and date of
manufacture.
(k) Hydrants shall be designed with a replaceable break-off ,
flange at ground level.
(1) All hydrants shall be installed with an auxiliary valve
S.P. 8 '
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allowing the hydrant to be shut down and the watermain to
continue operating.
(m) All hydrants and auxiliary valves shall be constructed with
properly sized joint restraint devices.
(n) The hydrant barrel extension above final grade shall range
from 25-30 inches.
18. VALVES AND BOXES
All valves 12" in diameter and over shall be butterfly valves as
referred to in this section. Valve boxes shall be cast iron of
the three piece type suitable for a depth of 72 feet to the top
of the pipe. Valves and boxes shall be considered integral units.
Valve boxes shall have at least 6" adjustment above and below
specified depth of pipe.
(a) Cast iron boxes and valve box sections shall be equal or
conform to those manufactured by the Tyler Corporation, Pipe
Division, 6860 Series, or Trinity Valley.
(b) Gate valves shall be of the Resilient Seat 200 lb. test type
and have a recommended non-shock water working pressure
rating of not less than 200 p.s.i.
(c) Resilient Seat Gate Valve stems shall be of high-strength
manganese bronze, non-rising type, opening to the left.
(d) Resilient Seat Gate Valves shall be furnished with ''O" ring
seal plate construction. Seal plates shall be machined to
contain two "O" rings.
(e) Resilient Seat Gate Valves shall have a fully encased wedge
sealing surface providing drop tight closure in either
direction of flow.
(f) Resilient Seat Gate Valves shall be furnished with 2" square
operating nuts and all the necessary glands, bolts and
conductive gaskets as required for installation of mechanical
joint valves.
(g) Resilient Seat Gate Valves shall be coated internally and
externally with a non-toxic epoxy coating which shall impart
no taste or odor to water.
(h) Butterfly valve bodies shall be of cast iron ASTM A0126,
Class B, with mechanical joint ends.
(i) Butterfly valve bearings shall be self-lubricating and
non-corrosive.
(j) Butterfly valve packing shall be permanent, self-adjusting.
S.P. 9
(k) Butterfly valve disc shall be ASTM A-436 Ni-Resist, Type 1
with polished edges or ductile iron, with Type 304 stainless
steel, 360° sealing surface. ,
(l) Butterf ly valve seat shall be special resistant Hy-Car bonded
permanently to the body or mechanically retained to the body. '
Seating on the disc is not acceptable.
(m) Butterfly valve operator shall be cast iron, sealed and e
lubricated for permanent buried or submerged service,
equipped with an AWWA operating nut.
(n) Butterfly valves shall be constructed for 150 psi differen- i
tial pressure and tested drip-tight in both directions of
-flow.
(o) Butterf ly valves shall be of current production and be
supplied by a manufacturer with a b ackground of at least five
years of successful applications and production in this
field. ,
(p) Butterfly valves 4" through 24" for buried or submersible
service shall be constructed with materials at least equal ,
to, or superior to, AWWA Standard C-504-87.
(q) Mechanical joint gate valves shall have hub end gasket '
seating surfaces, fully machined to fixed dimensions and
to lerances.
(r) Tappirx3 sleeve valves shall comply with the provisions of ,
resilient seat gate valves and shall be flanged inlets and
mechanical joint outlets.
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(s) The use of Duc Lugs and set screw retainer glands as
restraining devices is not permitted.
19. POLYETHYLENE ENCASEN~NT
All watermain, valves, hydrants, fittings, etc. shall be
polyethylene encased. Materials and installation procedures shall '
conform to the Standard Utilities Specification. Except for
hydrants with plugged weep holes as required by the Engineer
the
,
polyethylene tubing shall have an open drain outlet. ,
20. WATER SERVICE GROUP
A water service group shall include the curb stop, the service
corporation and any other parts (excluding the copper pipe
necessary for the installation of the water service). All '
materials shall conform to AWWA Standards.
Service corporations shall be A.Y. McDonald 4701-L or equal with
S.P. 10 ,
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a 1" full-dimension inlet and outlet. Tapping saddles shall be
used for service corporations on all pipe 10" in diameter or
less, and shall be Smith-Blair No. 313 or equal. Curb stops shall
be Minneapolis thread type, A.Y. McDonald 6104 or equal with a 1"
full dimension inlet and outlet. The interior opening shall also
be 1". Curb boxes shall be A.Y. McDonald 5622 with A.Y. McDonald
5623E lid or equal for 1" curb stops with Minneapolis top
adjustable for 8.0 feet of length at full extension. Rods shall
be supplied for all curb stops.
21. MATERIALS
All DIP watermain shall be Class 52. All water services shall be
type K, coppe r.
All sewer mains, services and fittings shall be constructed
utilizing PVC, SDR 35 sewer pipe with gaske ted joints.
All storm sewer pipe shall be Class III RCP with CX-4 rubber
gasketed joints.
22. MANHOLE CASTINGS
All sanitary sewer manhole castings shall be Neenah R-1642 with
the type B, self-sealing lid with concealed pickholes and the
appropriate name stamped on it.
23. SERVICES
Services shall extend ten feet into each lot to be served with an
accuracy of + one foot.
24. COMPACTION UNDER SERVICES
Any soil that is subcut from below a service must be compacted
back in place at 100% standard proctor density prior to laying
the service. Density tests must be taken to confirm the density.
If the soil is not corrq~acted to 100% standard proctor density,
then crushed rock must be compacted and placed below the service
in order to ensure no movement. Use of crushed rock shall be at
the Contractor's expense.
25. TIES ~ AS-BUILTS
The Contractor shall obtain a minimum of 3 ties from fixed
objects (i.e. manholes, catchbasins, power poles, buildings,
phone risers, power pads, etc.) to all water valves and curb
stops. These ties shall be submitted to the Engineer on copies of
the tie sheet at the end of these specifications (one copy for
each lot or service group) .
The Contractor shall also supply the Engineer As-Built drawings
S.P. 11
showing all changes made in the original plan construction (i.e.
pipe lengths, fittings, locations, service locations, etc.)
26. SANITARY SEWER TESTING
The Contractor shall utilize PVC for construction of the sanitary
sewer lines. The Contractor shall pay particular attention to the
bedding requirements for PVC pipe. The PVC pipe shall be tested
for a maximum pipe wall deflection of 5% of the normal pipe size.
This testing shall be done in the presence of the Engineer and at
the completion of all backfilling operations. If any portion of
the line is not within the maximum pipe wall deflection of 5%,
this portion shall be re-excavated, properly bedded and tamped,
and the trench recompacted and tested for density at no
additional expense to the Owner. The line shall then be tested
again for pipe wall deflection. Deflection testing shall not be
done prior to the pipe being in place for 30 days.
27. SUBSURFACE EXPLORATION
No soil borings have been taken on this project. The Contractor
shall therefore conduct a thorough subsurface exploration to
determine the site's condition.
28. CRUSHED ROCK
A bid item for crushed rock has been included for this project.
This bid item shall only be used if the Engineer determines that
the soil conditions warrant its use. No payment for crushed rock
wi 11 be made in 1 ieu of dewatering.
29. STREET CONSTRUCTION
This project consists of the street construction in two (2)
construction seasons. After paving the bituminous base course,
all gate valves and manholes shall be adjusted to 3/4" below the
top of the finished base course. No diamonds shall be provided
around the gate valves and manholes. Prior to paving the
bituminous wear course, all gate valves and manholes shall be
adjusted to 3/4" below the top of the finished wear course.
Bituminous patching around the gate valves and manholes shall be
completed a minimum of 24 hours in advance of the bituminous wear
course construction. All bituminous patching shall be performed
with a smooth drum roller.
30. TEST ROLLING
The Contractor shall be required
the aggregate base in accordance
Construction Specifications. The
rolling prior to placement of
aggregate base shall pass the tes
the curbing.
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to test roll the subgrade and
to Article 2.04 of the Street
subgiade shall pass the test
the aggregate base and the
t rolling prior to placement of
S.P. 12
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31. WATER
Water for construction purposes may not be taken from any hydrant
within the city of St. Michael. Water may be purchased and
obtained from the Joint Powers Water Board at the hydrant in
front of the Board's pumphouse and office, located at 11100 50th
Street NE in the city of Albertville. The fee for use of this
hydrant is $50.00 per day, plus $2.00 for each thousand gallons
used. A permit per day must be obtained from the clerk of the
Joint Powers Water Board after paying the required fee. Water may
be obtained from this hydrant only after prior arrangements have
been made with the clerk of the Joint Powers Water Board for each
day it is to be used.
32. MANHOLE ADJUSTING RINGS
Mortar for the adjusting rings shall be placed between the rings
and on the outside only. No mortar shall be placed on the inside
of the adjusting rings. Mortar protruding into the interior of
the manhole shall be removed. Rings for both the manholes and
catch basins shall have at least Z" of mortar between them and
sufficient mortar on the outside to fill in the voids.
33. MANHOLE ADJUSTMENT
' A bid item has been included for the adjustment of the existing
manhole structures to final grade. Payment shall include the
adjusting rings, labor and other materials necessary to complete
the adjustment. Payment shall be per structure raised. See
' Article 32, Manhole Adjusting Rings for installation require-
ments.
' 34. CHIMNEY SEAL, EXISTING MH15
Existing MH15 is to be raised, utilizing five 2-inch adjusting
' rings. See Article 32, Manhole Adjusting Rings, for installation
requirements. On the exterior side of the rings the Contractor
shall install an external f lexible seal to prevent groundwater
infiltration into the manhole. The external rubber seals used
' for sealing the frame and chimney area of the manhole shall
consist of the following components:
1. Rubber Sleeve Extension: The flexible rubber sleeve and
' extension shall be extruded from a high grade rubber compound
conforming to the applicable requirements of ASTM C-923, with
' a h ardne ss ( duromete r ) of 45+5 .
The sleeve shall be corrugated, with a minimum thickness of
3/16 inches and shall be available in unexpanded vertical
' heights of 6 and 9 inches, each capable of a verticle
expansion of not less than 2 inches when installed. The top
section of the sleeve shall contain multiple sealing fins and
be designed to extend both over and under the manhole base
flange, thereby allowing it to be mechanically locked in
S.P. 13
1
place. The bottom section of the sleeve shall contain an
integrally formed compression band recess and multiple sealing
fins.
The extension shall have a minimum thickness of 3/16 inches.
The top portion of the extension shall be shaped to fit into
the bottom band recess of the sleeve and have its own
integrally formed band recess, which is located such that when
assembled the recess is centered over that of the sleeve. The
bottom section of the extension shall contain an integrally
formed compression band recess and multiple sealing fins.
Any splice used to fabricate the sleeve and extension shall be
hot vulcanized and have a strength such that the sleeve shall
withstand a 180 degree bend with no visible separation.
2. Compression Bands: The compression bands used to compress the
sleeve against the manhole frame shall be 16 gauge stainless
steel conforming to ASTM A-240, Type 304, with a minimum width
of 1 inch.
The top compression band shall have a shape and width
sufficient to, when tightened, mechanically lock the sleeve
and frame together.
The tightening mechanism on both bands shall have the capacity
to develop the pressures necessary to make a watertight seal
and shall have a minimum adjustment range of 2 diameter
inches. Screws, bolts and nuts used on the bands shall be
stainless steel conforming to ASTM F-593 and 594, Type 304.
The Contractor shall field measure the outside diameter of the
manhole frame base flange, the manhole chimney or grade rings and
cone. These measurements are needed to obtain the proper sized
rubber seal.
The surface of the manhole chimney or cone/corbel against which
the sleeve is to be compressed shall be circular, clean,
reasonably smooth and free of any loose material and excessive
voids. If the masonry surface is rough or irregular and would not
provide an effective seal, it shall be smoothed with an approved
low shrink mortar. A bead of butyl rubber caulk, conforming to
AASHTO M-198, Type B, may be applied to the lower sealing surface
of the sleeve to fill any minor irregularities in the masonry
surface. Any flaws in the manhole frame such as cracks, pits or
protrusions, shall be repaired by either filling with mortar or
grinding smooth.
The manhole frame shall be set on top of the three steel spacers,
centered on the chimney, and embedded in a mortar course having a
minimum finished thickness of 3/4 inches. The outer surface shall
be raked free of mortar to a minimum depth of 1 inch and the
S.P. 14
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inner surface of this mortar joint shall be trowel finished.
' Butyl gasket material shall not be used in this joint.
After the rubber sleeve has been placed in the proper position
around the manhole, the stainless steel bands are positioned in
their respective locations and individually tightened as required
to provide a watertight seal.
' When an extension is used, it shall be positioned around the
outside of the chimney seal sleeve such that the top of the
extension fits into the bottom band recess of the sleeve. A
' bottom band is positioned in each of the two band recesses of the
extension and tightened as required to provide a watertight seal.
' Detailed installation instructions shall be in accordance with
the manufac tuner's instructions. The chimney seal shall be as
manufactured by Cretex Specialty Products or approved equal.
Payment shall include the chimney seal, labor and other materials
necessary to complete the installation. Payment shall be per the
chimney seal installed.
35. SIGNS
' The sign materials and hardware shall conform to MnDOT 3352 for
the type of sign specified. Stainless steel lag bolts, conforming
to the sign manufacturer's recommendations, shall be required.
The sign posts shall conform to MnDOT 3401 and shall have a
nominal weight of 2.75 pounds per foot of length. Mounting height
of the signs shall be seven (7) feet. The embedment depth shall
be a minimum of 3.5 feet.
36. FREE FLOW SKIMI~R
The concrete for the skimmer shall conform to MnDOT Specification
2461 design mix number 3A32.
All reinforcing steel shall be Grade 60, epoxy-coated, deformed
' Billet Steel bars, in conformance to MnDOT Specification 3301.
The grating shall be 5/8" square or circular bars. The grating, .-
hinging and locking devices shall be galvanized in conformance to
' MnDOT Specifications 3392 and 3394.
The skimmer shall be constructed in the field in accordance to
' MnDOT Specification 2401. The Contractor may elect to precast the
skimmer at a factory approved by the Engineer utilizing the
materials specified above.
Payment for the skimmer shall be by lump sum measure and shall
include all materials, equipment and labor necessary for a
complete installation.
r S.P. 15
37. WETLAND VEGETATION
The ten-foot ledge within the sedimentation pond shall be seeded
with an emergent equatic vegetation. This vegetation shall be
Green Bulrush (Surpus Atrovirens) as supplied by one of the
following seed vendors:
Prairie Restorations, Inc.
PO Box 3 27
Princeton, MN 55371
(612) 389-4342
Prairie Moon Nursery
Rt. 3, Box 163
Winona, MN 55987
(507) 452-1362 or 5231
The seed shall be applied at the rate of 50 lbs. pure live seed
(PLS)/acre. Seeding shall be performed per the vendors recommen-
dation.
Seeding of the wetland vegetation shall be paid by the acre and
shall include all materials, equipment and labor necessary for a
complete installation.
38. PROTECTION OF EXISTING UTILITIES
Section 18 of the General Conditions addresses protection of
existing utilities and property. This is a further clarification
of sanitary sewer protection. The Contractor shall use utmost
care during his operations and particularly during manhole
adjustments to keep gravel and debris from entering sanitary
sewer manholes. In the event of debris or gravel entering the
sanitary sewer lines, these lines shall be jetted by Roto-Rooter
or other approved company at the expense of the Contractor.
Flushing of debris or gravel down the sanitary sewer line will
not be allowed.
39. SPECIFICATIONS WHICH APPLY
The Minnesota Department of Transportation "Standard Specifica-
tions for Construction", 1988 Edition, together with all
supplements thereto, and the Joint Powers Water Board's "Standard
Specifications for Watermain and Service Line Installation" dated
January, 1991, shall govern except as superceeded by the attached
General Conditions or modified herein by the Special Provisions
and attached specifications.
40. STANDARD PLATES
All references to standard plates MHD shall mean the "Standard
Plates" of the Minnesota Department of Transportation. All other
reference to standard plates shall mean those details attached to
the plans.
41. CONSTRUCTION LIMITS
The Contractor shall confine his activities to the right-of-way
or designated construction area. Equipment and material storage
S.P. 16
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or deposition of excavated materials on private property must be
approved in writing by the property owners, a copy of which shall
be presented to the Engineer prior to such stora e or deposition.
Failure to do so will result in immediate suspension of work
' until such approval has been obtained or materials removed, and
area restored to its previous condition or better.
42. SHOP DRAWINGS
The Contractor shall submit shop drawings for approval by the
Engineer for all materials to be used on the project. These shall
' include pipes, fittings, hydrants, manholes, castings, silt
fence, etc. A minimum of six copies of each shall be supplied to
the Engineer.
'
43. LIEN WAIVER
S
' The Contractor shall furnish partial or complete lien waivers
along with each payment request
The lien waivers shall b
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submitted by the Contractor, all subcontractors, and all material
suppliers on the project. No payment will be authorized unless
' the lien waivers are received.
' 44. STATE OF MINNESOTA WITHHOLDING REQUIREMENTS
The Contractor and all subcontractors shall submit
State form
IC-134, "Withholding Affidavit for Contractors" along with the
final payment request. No payment will be authorized unless the
IC-134 forms are received.
The Contractor shall also be aware of Minnesota Statute 290.9705
regarding out-of-state contractors.
Forms may be obtained from the Minnesota Department of Revenue,
' Business Trust Tax Division.
45. PERFORMANCE BOND
' Article 5 of the General Conditions is hereby amended as follows:
The first sentence of the second paragraph shall read, "This bond
shall be kept effective and in full force for two (2) years after
~ completion and acceptance of the work."
The remainder of Article 5 shall remain in full effect.
' 46. INSURANCE
Article 6 of the General Conditions shall be amended as follows:
' The second paragraph under item b, Article 6 of the General
Conditions is hereby deleted and replaced with the following
paragraph:
' S.P. 17
C
"Amount of Insurance shall be as follows: Public Liability
Insurance shall not be less than Five Hundred Thousand
($500,000) Dollars for injuries including accidental death, to
one person, subject to the same limit for each person, not
less than One Million ($1,000,000) Dollars for one accident.
Property Damage shall be for Two Hundred Thousand ($200,000)
Dollars for each accident but not less than Four Hundred
Thousand ($400,000) Dollars aggregate."
The remainder of Article 6 shall remain in full effect.
47. GUARANTEE
The guarantee requirements of Article 26 of the General
Conditions is hereby amended to call for a two (2) year guarantee
period after .completion and acceptance of the work. All other
requirements of this section shall remain in effect.
48. ALTERNATE BID
The City is requesting that an alternate bid be provided for
Dual-Wall Corrugated Polyethylene pipe to be installed on
selected segments of the storm sewer system. The City shall
select the low bid based upon the RCP storm sewer system. If the
bids indicate that a significant cost savings will be achieved by
using the polyethylene pipe, the City may elect to substitute it
for the reinforced concrete pipe specified as the base bid.
49. DUAL-WALL CORRUGATED POLYETHYLENE PIPE
The polyethylene pipe shall conform to the requirements of MnDOT
2503 as identified in MnDOT Technical memorandum 91-7-B-1, dated
April 2, 1991. A_11 pipe joints shall be waterti ht. After the
installation of the pipe, it shall be deflection tested in
conformance to MnDOT 2503D.
50. CLEANOUT AND CLEANOUT MANHOLES
The cleanouts and cleanout manholes shall be installed per
details 2.018 and 2.018A. The starting ~oint of measurement for
each of these structures shall be the 45 bend off the main sewer
line. Payment for the cleanout shall include the bends, riser
pipes and cap. Payment for the cleanout and cleanout manhole
shall include the bends, riser pipes, cap, granular backfill
materials and manhole. Payment shall be per the cleanout or
cleanout and cleanout manhole installed.
S.P. 18
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' Form
IC-134
Rev. i i/90
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Minnesota Department of Revenue
Withholding Affidavit for Contractors
This affidavit must be approved by the Minnesota Department of Revenue before the
State of Minnesota or an of its subdivisions can make final a ment to contractors.
Company name Minnesota ID number
Address Monthtyear work began
City State Zip Code Month/year work ended
Please type or print clearly above. This will be your
mailing label for returning the completed forma Total contrail amount:
Telephone number Amount still due:
Did you have employees work on this project? Project number:
If none, explain who did the work: Project location:
Project owner:
Address
Check the box that describes your involvement in the project and fill in all information requested in that category:
^ Sole contractor
^ Subcontractor If you are a subcontractor, fill in the name and address of the contractor that hired you:
^ Prime Contractor If you subcontracted out any work on this project, all of your subcontractors must file their own
IC-134 affidavits and have them certified by the Department of Revenue before you can Fite your
affidavit. For each subcontractor you had, fill in the business information below, and attach a copy
of each subcontractor's certified IC-134. (If you need more space, attach a separate sheet.)
Business name Address Owner/Officer
t
' I declare that all information 1 have tilled in on this form is true and complete to the best of my knowledge and belief. 1 authorize
the Department of Revenue to disclose pertinent information relating to this project, including sending copies of this form,
to the prime contractor if I am a subcontractor, and to any subcontractors if 1 am a prime contractor, and to the contracting agency.
Contractor's signature Title Date
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For certification, mail original and one copy to:
Minnesota Department of Revenue, Business Trust Tax Section
Mail Station 6610, St. Paul, MN 55146-6610
Certificate of Compliance with Minnesota Income Tax Withholding Law
Based on records of the Minnesota Department of Revenue, I certify that the contractor who has signed this certificate has
fulfilled all the requirements of Minnesota Statutes 290.92 and 290.97 concerning the withholding of Minnesota income tax from
wages paid to employees relating to contract services with the state of Minnesota and/or its subdivisions.
Signature of authorized Department of Revenue official Date
Stock No. 5000134
0
Instructions for Form IC-134
Who should file?
If you are a prime contractor, a contrac-
tor, or a subcontractor who did work on
a project for the state of Minnesota or
any of its local government subdivisions
-such as a county, city, or school
district -you must file Form IC-134
with the Minnesota Department of
Revenue.
This affidavit must be certified and
returned before the state or any of its
subdivisions can make final payment for
your work.
When to file.
The IC-134 cannot be processed until
you are finished with the work. Do not
send the affidavit in for certification
before the project is completed since it
will only be returned to you unproc-
essed. If you are a subcontractor or
sole contractor, file Form IC-134 when
you have completed your part of the
project.
If you are a prime contractor, file Form
IC-134 when the entire project is
completed and you have received
certified affidavits from all of your
subcontractors.
Where to file
Fill out Form IC-134 and mail the
original and one copy to:
Minnesota Department of Revenue
Business Trust Tax Section
Mail Station 6610
St. Paul, MN 55146-6610
How to fi/e
If you have fulfilled the requirements of
the withholding tax laws of Minnesota,
the Department of Revenue will sign
your affidavit, keep the copy, and return
the original to you. If you want it
returned to a different mailing address,
please enclose a mailing label or
preaddressed envelope.
If any withholding payments are due
to the state, Minnesota law (M.S.
290.97) requires that payment must
be made by only money order,
cashiers check, certified check, or
cash.
Take the certified affidavit to your prime
contractor or to the governmental unit
for which the work was done in order to
receive your final payment.
Minnesota tax identification
number
You must fill in your Minnesota tax
identification number on the form. You
must have a Minnesota tax ID number if
you have employees who work in
Minnesota.
If you need a number, get Form MBA,
Application for Tax Identification
Number, and file it with the Minnesota
Department of Revenue. To get Form
MBA, call 296-3781 from the Twin
Cities area or 1-800-652-9094 from
elsewhere in Minnesota, or write to
Minnesota Tax Forms, Mail Station
7131, St. Paul, MN 55146-7131.
If you have no employees and did all
the work yourself, you do not need a
Minnesota identification number. If this
is the case, fill in your Social Security
number in the space for Minnesota ID
number and explain who did the work.
Are you a prime contractor
and a subcontractor on the
same project?
If you are a subcontractor who was
hired to do work on a project and you
subcontract all or a part of your portion
of the project to another contractor, you
become a prime contractor as well. If
this is the case, fill out both the subcon-
tractorand prime contractor areas on a
single form.
Use of information
The Department of Revenue needs all
the information, except your phone
number, to determine whether you have
met all state income tax withholding
requirements. If all required information
is not provided, the IC-134 will be
returned to you for completion.
All information on this affidavit is
guaranteed private by state law. It
cannot be given to others without your
permission, except to the Internal
Revenue Service, other states that
guarantee that it will be kept private,
and certain state or county agencies.
If you need help or additional informa-
tion to fill out this form, call 296-6181 in
the Twin Cities area. From elsewhere
in Minnesota and from outside the
state, call (toil-free) 1-800-657-3777.
To get more 1C-734 forms
If you need more IC-134 forms, call
296-3781 from the Twin Cities area or
1-800-652-9094 from elsewhere in
Minnesota, or write to Minnesota Tax
Forms, Mail Station 7131, St. Paul, MN
55146-7131.
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STREET CONSTRUCTION SPECIFICATIONS
1.0 SCOPE
1.1 LOCATION OF WORK
The location of this work is as shown on the plans.
1.02 WORK INCLUDED
The Contractor shall, unless specified otherwise, furnish all
materials, equipment, tools and labor to do the work required under
this contract in strict conformance with the plans and specifica-
tions prepared for the purpose by Meyer-Rohl in, Inc. , Engineers and
Land Surveyors, 1111 Highway 25 North, Buffalo, Minnesota. The work
shall include, but not be limited to, the excavation of the entire
roadway between right-of-way lines to the prescribed sub-grade and
cross-section; supplying, spreading and compacting the sub-base;
supplying, spreading and compacting the base; bituminous surfacing
of the streets with the specified tack coat, bituminous bases and
bituminous wear of specified thickness and all necessary backfil-
ling, surface restoration and cleanup, as specified.
1.03 SPECIFICATIONS WHICH APPLY
The Minnesota Department of Transportation Specifications for
Highway Construction, 1988 Edition, together with all supplements
thereto, shall govern except as superceded by the attached General
Conditions or modified herein by the Special Provisions and
attached specifications.
2.00 GRADING
2.01 GENERAL
The work covered in this specification shall consist of the cutting
and/or filling of the full street width to provide the required
cross-section shown on the drawings. The work covered by this
section will be done in accordance with Section 2105 and 2112 of
Minnesota Department of Transportation Specifications for Highway
Construction, 1988 Edition, except as modified hereafter.
2.02 SUBGRADE
The subgrade shall be brought to the prescribed cross-section and
grade by the necessary excavation and fill by using acceptable
existing materials and thoroughly compacting all necessary fill
material. The subgrade shall then be prepared in accordance with
Section 2.05.
~i
In the event of poor sub-grade material, the Engineer shall be
notified immediately so a determination can be made as to the
correct procedure to follow.
Proper drainage shall be provided at all times so that the
sub -grade will be kept free of standing water. Any soft spots
developing from poor drainage and standing water shall be
completely excavated, b ackfilled, and compacted with an acceptable
dry material at no additional cost to the City.
2.03 EXCAVATION AND EMBANHI~NT (2105)
All operations shall be done in accordance with MnDOT Specification
No. 2105. All compaction will be done by the "Specified Density
Method" .
Density tests shall be taken to evaluate the compaction achieved.
The quantity of tests shall be determined by the Engineer in the
field.
Where density tests are taken to evaluate the compaction, the fill
shall meet the requirements of a minimum of 100% of Standard
Proctor Density (AASHTO T-99) in the upper three feet of the
embankment and a minimum of 95°!° of Standard Proctor Density below
the upper three feet, except when the existing soil moisture
content is over the "optimum" moisture content determined by the
Standard Proctor Density. When the existing soil moisture content
is over the "optimum" moisture content, the soil shall be compacted
to a density within five pounds per cubic foot (pcf) of the
theoretical density identified by the Proctor curve at that
moisture content. The Engineer reserves the right to reject
materials which are over "optimum" moisture content.
Subgrade excavation is further defined under Paragraph 2.06 of
these specifications.
Granular borrow and select granular borrow shall meet the
requirements of MnDOT Specification No. 3149; maximum particle size
to be six inches in diameter.
2.04 TEST ROLLING (2111 MODIFIED)
After the above work relative to compaction is completed, the
subgrade shall be test rolled in accordance with MnDOT Specifica-
tion No. 2111, except as follows:
Test rolling shall be performed prior to, intermittently during,
and. after completion of subgrade preparation work (2112) or
subgrade excavation work (2105) when ordered by the Engineer.
The yielding or .rutting portion of this specification 2111.3
shall apply only to the test roll for final acceptance of the
subgrade preparation; earlier test rolling shall be for the
STREET CONSTRUCTION page 2
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purpose of identifying those areas needing subgrade excavation,
' e tc. Later test rolling on the base course shall be to determine
if required stability exists. In embankment/fill areas, the
subgrade may be test rolled at an elevation lower than finished
subgrade elevation if the condition of the soils being placed
indicate that normal subgrade preparation (2112) cannot be
performed and that subgrade excavation (2105) may be necessary;
this procedure is to eliminate having to remove materials just
' previously placed. Test rolling shall also be used in conjunction
with the placing of aggregate or bituminous base courses when
ordered by the Engineer.
,' The Contractor will furnish a wheel loader (with operator) for
test rolling. The wheel loader shall have an approximate bucket
' size of three cubic yards and shall be fully loaded. Test rolling
will be required over the entire length and width of the proposed
roadway and one foot outside the back of curb. Test .rolling shall
be performed as many times as deemed necessary by the Engineer.
' The costs of the wheel loader and operator and any other costs
incurred during test rolling shall be incidental to construction
of the subgrade or base and no direct compensation will be made
' therefore. Test rolling, including retesting of repaired, failed
sections, shall also be considered as incidental.
' 2.05 SUBGRADE PREPARATION (2112)
After the test rolling is completed to the satisfaction of the
Engineer, the subgrade shall be prepared in accordance with MnDOT
' Specification 2112, except as follows:
The Contractor shall prepare the top 12 inches of subgrade by
means of scarifying, aerating or watering for at least a period
of 24 hours or as long as specified by the Engineer, in order to
obtain the required stability and density. If wet or poor soil is
encountered, the Contractor shall dry it out for a minimum period
of 24 hours in optimum drying weather or longer in other
conditions by aerating the soil by the use of blades, sheepsfoot,
or other mechanical means. Under normal circumstances no
determination as to the acceptability of a questionable subgrade
material will be made prior to the Contractor's drying out the
soil for the minimum time period. Areas which remain unstable
after normal subgrade preparation will be repaired at the
' direction of the Engineer as to MnDOT Specification No. 2105
(subgrade Excavation).
Unstable areas of subgrade due to inclement weather shall be
prepared by the Contractor at no compensation; subgrade deter-
mined satisfactory and the failing due to inclement weather also
shall be rep aired at no additional compensation.
The top 12 inches of sub rade shall be com acted t °
9 p o 100/ Standard
Proctor Density. The "required stability" shall be such that,
' STREET CONSTRUCTION page 3
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when test rolled, the roadbed surface shows yielding or rutting
of no more than 1'-z" measured from the top of the constructed
grade to the bottom of the rut. Tests shall be taken to evaluate
the compaction achieved. Tests shall be taken at the rate of one
test for every 100 feet of subgrade prepared. Testing shall be by
an independent test lab at the Contractor's expense. Under no
circumstances shall gravel be hauled until the subgrade has been
approved by the Engineer with respect to grade and density.
subgrade preparation will be required over the entire length and
width of the proposed roadways and one foot outside the back of
curb. Payment shall be by the square yard (sy) prepared.
2.06 SUBGRADE EXCAVATION (2105)
subgrade excavation shall consist of all excavations made below the
top of the subgrade surface of the road and between the shoulder
slopes, which are not made for the purpose of obtaining topsoil,
and the materials of which are not classified for payment such as
rock excavation. Thi s work shal l include the removal and disposal
of unsuitable materials in the roadbed and replacing such materials
with common excavation, common borrow, granular borrow, or base
materials, together with any other work necessary to provide
drainage for the excavations. All excavation shall be by the load
and haul method, with no scraper operation being acceptable. Common
excavation, common borrow, granular borrow, or base materials, when
used in replacing materials removed through subgrade excavation,
sh al 1 be as fo 11 aws
a. Common Excavation Material (2105.2A)
Common excavation material to be used in subgrade excavation must
be approved by the Engineer prior to placing. When this material
is used, the Contractor shall be paid for excavation of the
unsuitable materials and replacement of the unsuitable materials
with common excavation, at the common excavation unit price,
provided the common excavation material is furnished from an
initial excavation area.. If the common excavation material has
been moved once initially and stockpiled, then the material will
be paid as common borrow material, as described below.
b. Common Borrow Material (2105B)
When suitable or ample common excavation material can not be
found within the excavation limits, the common borrow material
approved by the Engineer will be used in subgrade excavation.
Borrow material will be obtained within the right-of-way if
available; if not, it may be obtained off the right-of-way at a
location located and negotiated by the Contractor. Regardless of
the location of the borrow source, only one bid item will apply
for furnishing of the borrow. When common borrow is used, the
Contractor shall be paid for excavation of the unsuitable
materials and replacement of the unsuitable materials with common
borrow.
STREET CONSTRUCTION page 4
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c. Granular Borrow Material (3149)
When common excavation or common borrow material cannot be
obtained by the Contractor on or off the right-of-way, the
Engineer may direct the Contractor to use granular borrow
material for subgrade excavation.
When granular borrow is used, the Contractor shall be paid for
excavation of the unsuitable materials and replacement of the
unsuitable materials with granular borrow.
All materials used for replacement in areas of subgrade
excavation shall be compacted in accordance with 2105 as
previously mentioned in paragraph 2.03. All replacement materials
in the top 12 inches of the subgrade shall then be compacted in
accordance with the provisions of subgrade preparation (2112), as
previously described in paragraph 2.05.
subgrade excavation shall be made to the depths and location
' indicated by the Engineer. Areas of subgrade excavation may be
required at random locations throughout the roadbed or may be
required as a "core-type excavation", wherein the roadbed is
' excavated for its entire length and width. No subgrade excavation
shall be done prior to subgrade preparation and test rolling.
Payment for subgrade excavation shall be by the cubic yard (e.v.)
' and shall be compensation for excavation and disposal of the
material.
' Generally, no subgrade excavation shall be used to correct
conditions caused by inclement weather. In cases where inclement
weather is continuous and for long periods of time, and does not
allow for expeditious completion of subgrade preparation by use
of 2112 and/or 2105, the Engineer may require the Contractor to
prepare the roadways as follows:
' (1) Make a core excavation of the subgrade to a depth as
directed by the Engineer.
' (2) Replace the excavated material below subgrade with the
same materials to be used for base material (Class 5, etc.)
and then immediately continue to place the loose material in
the area above the subgrade elevation. The subgrade excavation
' and the base course both shall be constructed with base
material in a fashion which will con tribute to "bridging". In
this case, after the subgrade excavation has been made and the
conditions do not allow-for compaction, then the bottom of the
subgrade excavation shall be subcut to a uniform bottom and
the base material shall be placed in a fashion to prevent
pumping or intrusion of the subgrade into the base material.
Generally, the first 12 inches of the material shall be
deposited on the subgrade before any rolling or compaction
begins. All compaction done in this situation shall be by use
' of static equipment.
' STREET CONSTRUCTION page 5
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(3) When this procedure for subgrade excavation is used the ,
Contractor shall be paid for excavating the unsuitable
materials below subgrade elevation and shall be paid for all
base materials used above and below subgrade elevation, all at
contract unit price; the compaction of this base material
shall be considered incidental. Also, when this method is '
used, the Contractor shall not be paid for subgrade prepara-
tion (2112).
Base material used for backfill, as described above for "bridging" 1
,
will be paid for at the same unit price paid under the applicable
base price and unit.
In areas of embankment/fill, the Contractor and the Engineer shall
both observe the placement of materials and if it appears that the
soils being placed will not be able to be prepared under normal
subgrade preparation and that subgrade excavation will be neces-
sary, then the subgrade shall be left lower than final elevation so
as to eliminate having to pay for excavation of materials that were
just previously placed. Particular attention shall be paid that '
capping of granular materials with non-granular materials is not
permitted at or within 12 inches of the subgrade surface.
Any over-excavated areas shall be returned to the proper grade and
cross-section by the Contractor at no additional cost to the owner.
2.07 EXCESS MATERIAL
Excess material not used on the projec t is the property of the
Owner and shall be disposed of as directed by the Engineer within a
distance of one mile from the site of the work. Disposal of the
excess material shall be incidental to the excavation unit price.
3.00 CLEARING OF STREET RIGHT-OF-WAY
3.01 GENERAL '
This work shall consist of removing and disposing of trees, shrubs
,
roots, wind falls, stumps and abandoned structures such as
sidewalk, curb and gutter, culverts, manholes, and catch basins
.
The work shall include the salvaging of designated materials and
the backfilling of the resulting trenches, holes and depressions.
e
3.02 REMOVING MISCELLANEOUS STRUCTURES
The Contractor shall remove and dispose of all abandoned structures '
and obstructions designated by the Engineer. Culverts, manholes
and catch basins shall be salvaged and the Contractor shall deliver
all salvaged structures to the Owner. Sidewalks, curb and gutter
and driveway pavement shall be removed at a joint or shall be sawed
to one-third the thickness of the concrete. The exposed edge of
removal shall be straight with no chips or cracks.
STREET CONSTRUCTION page 6
4.00 AGGREGATE BASE
4.01 GENERAL
The Contractor shall notify the Engineer when the subgrade is to
proper grade and cross-section for acceptance before proceeding
with the base.
This work shall consist of construction of one or more courses of
aggregate base on a prepared sub-base. Work shall be done in
accordance with Section 2211 of Minnesota Department of Transporta-
tion Specifications for Highway Construction, 1988 Edition, except
as modified hereafter.
' 4.02 MATERIALS
Gravel material shall be of the class designated on the typical
section of the plans. Gravel material shall meet the requirements
' of Section 3138 of Minnesota Department of Transportation Specifi-
cations for Highway Construction, 1988 Edition, except as modified
hereafter.
~J
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4.03 TESTING
Samples of the aggregate base material shall be taken at the
project site at the rate of one test for every 1000 feet of base
(minimum). A minimum of two tests shall be required on the project.
An independent lab shall perform the tests and confirm the
gradation. All test reports shall indicate the location where the
samples were taken. The gravel shall meet Class 5 gradation
requirements prior to the placement of curbing or bituminous
application.
4.04 COMPACTION
Compaction shall be by the "ordinary compaction" method. Each layer
shall be compacted until there is no further evidence of
consolidation, using a tamping, steel-wheeled or pneumatic-tired
roller, meeting the requirements of the Minnesota Department of
Transportation Specfication 2123. The Engineer may elect to test
the compaction with field density tests. The base material shall be
compacted to 100% of standard proctor density.
4.05 QUALITY CONTROL
The gravel base shall be approved 24 hours before the bituminous
' base application. The base shall be within ?" + at the crown and
quarter crown.
4.06 PAYMENT
Payment for the aggregate base shall be on th e basis of cubic yards
of material furnished and compacted in place and shall be
compensation in full for all costs incidental to its construction.
STREET CONSTRUCTION page 7
5.00 BITUMINOUS BASE COURSE
5.01 WORK INCLUDED
The Contractor shall, unless specified otherwise, furnish all
material , equi~cnent, tools and labor for the construction of a
paver-laid bituminous base as noted on the plans, and shall be done
in accordance with Section 2331 of Minnesota Department of
Transportation Specifications for Highway Construction, 1988
Edition, except as modified below.
5.02 AGGREGATE
Aggregate material shall be Class B, Section 3139.
5.03 BITUMINOUS MATERIAL
For the mixture, the bitumin
120-150 penetration. The oil
The Contractor shall furnish
to construction. Cost of the
payment for bituminous base.
ous material shall be asphalt cement,
content shall be 4% to 6% by weight.
the Engineer with a design mix prior
design mix shall be incidental to the
5.04 CONSTRUCTION
All curb and gutter must be backfilled before any blacktop is
applied to the street. Prior to placement of the base course, any
existing bituminous surface abutting it shall have a straight cut
joint made, it shall be cleaned, and it shall be liberally tacked
with a bituminous material. After paving the base, all gate valves
and manholes on this project shall be adjusted to 3/4" below
finished grade for the winter. All disturbed aggregate base shall
be recompac ted and the blacktop patched. A 3-foot diamond of
bituminous shall be placed around the manholes to protect them from
the snowplows. A 1-foot diamond. of bituminous shall be placed
around the gate valves to protect them from the snowplows.
5.05 PAYMENT
The bituminous base shall be paid for on the basis of square
yard-inch at plan thickness. Unless otherwise directed by the
Engineer, all streets shall be constructed with a bituminous
thickness as shown on the plans.
Payment shall be compensation for preparation of all existing
surfaces, furnishing materials, laying and rolling.
STREET CONSTRUCTION page 8
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6.00 BITUMINOUS WEARING COURSE
6.O1 WORK INCLUDED
The Contractor shall, unless otherwise specified, furnish all
materials, equipment, tools and labor for the construction of a
plant mixed, paver laid, bituminous surface as noted on the plans,
and shall be done in accordance with Section 2331 of Minnesota
' Department of Transportation Standard Specifications for Highway
Construction, 1988 Edition, except as modified below.
' 6.02 AGGREGATE
Aggregate material shall be Class A, Section 3139. Mineral filler
' shall be as per Section 3145.
6.03 BITUMINOUS MATERIAL -.
' For the mixture, the bituminous material shall be asphalt cement,
120-150 penetration. Oil content shall be 4.7% to 6.5% by weight as
determined by the Engineer. The contractor shall furnish the
' Engineer with a design mix prior to construction. Cost of the
design mix shall be incidental to the payment for bituminous base.
' 6.04 CONSTRUCTION
Unless otherwise called for in the special provisions, the wear
course shall not be installed until the construction season
following the placement of the base. After the street has been
' paved and prior to rolling, a 3 /4" plywood plate shall be placed
over each of these structures and the edges raked. The roller shall
1 then roll the wear until no sign
may be removed of settlement occurs and the plate
.
Prior to the application of any bituminous wearing course mixture,
the base course shall receive a bituminous .tack coat in accordance
with MnDOT Specification 2357. The bituminous tack coat shall be
applied at a rate of 0.05 gallons per square yard. The cost of the
tack shall be included in the wear course unit price.
The bituminous wear course at the edge of the curb and gutter shall
be ~" above the edge, following compaction. The additional cost of
' the materials along the edge shall be incidental to the cost of the
wear course.
6.05 PAYMENT
The bituminous wea r shall be paid for on the basis of square
' yard-inch at plan thickness. Unless otherwise directed by the
Engineer, all streets shall be constructed with a bituminous
thickness as shown on the plans.
STREET CONSTRUCTION page 9
Payment shall be compensation for cutting the existing bituminous,
sweeping, tack coat, furnishing materials, laying .and rolling.
At the conclusion of the project, cores in the blacktop m~ be
ordered if in the opinion of the Engineer the pavement does not
meet the specifications. A minimum of one core for every 400 feet
of roadway shall be taken. The following tests shall be-run by an
independent test lab at the Contractor's expense.
1. Thickness
2. Marshall Density
3. Gradation
4. Extraction
If the Marshall Density for the cores is less than the specified
minimum density, then in lieu of being removed and replaced to an
acceptable condition, it will be accepted at a reduced rate
according to MnDOT Specification 2331.3, 1988 Edition.
In addition, an average thickness of all the cores shall be
computed. Based upon that thickness, payment for both the wear and
base shall be adjusted according to the following schedule:
a. average thickness 0.15 inches less than plan and greater
(except where ordered by the Engineer) : payment made at unit
prices.
b. average thickness: 0.16-0.25 inches less than plan: 15%
reduction of unit prices as bid.
c. average thickness 0.26-0.50 inches less than plan: 30%
reduction of unit prices as bid.
d. any specific area which has a test thickness less than plan
thickness minus 0.50 inches shall be replaced.
7.00 HAUL SLIPS
"Haul slips" showing tonnage of all bituminous and rock material
delivered to the job site shall be submitted to the Engineer on a
daily basis. All tonnage tickets shall be weighed and not
estimated.
Unless the .method of payment called for on the proposal is by the
ton, all haul slips supplies-will be used for verification of the
cubic yard or square yard quantities only.
8.00 CONSTRUCTION OBSERVATION AND TESTING
All phases of the work shall be open to the Engineer or his
STREET CONSTRUCTION page 10
n
representative and the Contractor shall allow the use of such
facilities as are necessary to properly inspect the work. The
Contractor shall submit test results as determined by an approved
testing laboratory of all materials to be used before any related
construction begins. .The Contractor shall furnish reasonable
amounts of the materials during the construction progress to be
used for periodic testing.
' 9.00 CLEANUP
When the work has been completed, the Contractor shall remove from
the site all extra material, equipment, debris and other supplies.
' The site shall be cleaned up as is necessary to leave all property
in substantially the same condition as it was before the project.
' 10.0 SEEDING, SODDING ~ BLACKDIRT
Pro visions of MnDOT Specification ,~ 3878 shall govern for sod and
#3876 shall govern for seed. Seeding and sodding work shall conform
' to NInDOT Specification ,2575. Salvaged topsoil shall be obtained
.from suitable on-site materials meeting MnDOT requirements. If
topsoil borrow is obtained from a source off-site, it shall be
' pulve rued black dirt acceptable to the Engineer. Salvaged topsoil
and topsoil borrow shall be spread to a compacted thickness of 4
inches prior to sodding or seeding. The seed shall be MHD mixture
number 500 and shall be applied at the rate of 100 pounds per acre.
All areas seeded shall be fertilized. The fertilizers shall be dry
and shall contain available nitrogen, phosphoric acid and potash in
proportions which will supply the minimum quantities of these plant
' foods. All areas seeded shall be mulched per MnDOT specifications,
using Type I mulch and disc anchoring.
The Contractor shall have the topsoil tested to determine the type
' -and application rate of fertilizers to use. For bidding purposes,
the Contractor shall use an-application rate of 300 pounds per acre
of a 20-10-10 fertilize r.
' Payment for sodding shall be by the square yard and shall include
the sod, salvaged topsoil, watering and all equipment and labor
' necessary to the proper installation of the sod. Payment for
seeding shall be by the acre and shall include the seed,
fertilizer, salvaged topsoil, mulch and all equipment and labor
necessary to the proper installation of the seed. Payment for
' topsoil borrow shall be by the cubic yard (LV) and shall include
the topsoil, trucking, equipment and labor necessary for the proper
installation of the topsoil borrow.
' All placement of black dirt behind curbing shall be done prior to
paving.
' The Contractor shall be aware that the quantities of sod and seed
used next to the curb shall be at the owner's discretion and that
they may be changed or deleted with no change in the unit price.
STREET CONSTRUCTION page 11
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CONCRETE CURB SPECIFICATIONS
DESCRIPTION
Curb or combined curbs and gutters, sidewalks and driveway aprons
shall consist of air-entrained portland cement concrete con-
structed on a prepared subgrade in accordance with these
specifications. This work shall be in reasonably close conformity
with the lines and grades, thicknesses, and typical cross sections
shown on the plans or established by the Engineer. All work shall
be performed in accordance with MnDOT specifications.
CONCRETE
The air-entrained .portland cement concrete shall meet the
requirements of MnDOT specification 2461. The component parts
shall be batched by weight, in proportions, to produce a concrete
developing a minimum compressive strength of 4000 psi in 28 days.
The concrete shall have a uniform consistency and slump. The slump
shall be between 1 and 3 inches for handvibrated concrete, between
2 and 4 inches for hand-tamped or spaded concrete, and between i
and 2 inches for concrete placed by a slipform/extrusion machine.
A design mix shall be submitted to the Engineer for approval prior
to installation.
BASE PREPARATION
The base shall be a minimum thickness of 6 inches of class 5
gravel under all curb and gutter and all driveway aprons. A
minimum base thickness of 4 inches of pit run sand shall be placed
beneath all sidewalks. The base shall be compacted and shall
extend a minimum of 1 foot outside the curb and drives and 0.5
feet outside sidewalk forms. The base shall be reasonably dense,
firm, trimmed to a uniform smooth surface and in a moist condition
when the concrete is placed.
MACHINE PLACEMENT
' The slipform/extrusion machine approved shall be so designed as to
place, spread, consolidate, screed, and finish the concrete in one
complete pass in such a manner that a minimum of hand finishing
' will be necessary to provide a dense and homogeneous concrete
section. The machine shall shape, vibrate, and/or extrude the
concrete for the full width and depth of the concrete section
being placed. It shall be operated with as nearly a continuous
forward movement as possible. All operations of mixing, delivery,
and spreading concrete shall be so coordinated as to provide
' uniform progress, with stopping and starting of the machine held
to a minimum.
Concrete 1
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FORMED I~THOD
The forms shall be of wood, metal, or other suitable material that
is straight and free from warp, having sufficient strength to
resist the pressure of the concrete without displacement and
sufficient tightness to prevent the leakage of mortar. Flexible or
rigid forms of proper curvature may be used for curves having a '
radius of 100 feet or less. Division plates shall be metal.
The front and back forms shall extend for the full depth of the
concrete. All of the forms shall be braced and staked so that they
remain in both horizontal and vertical alignment until their
removal. They shall be cleaned and coated with an approved
form-release agent before concrete is placed against them. '
The concrete shall be deposited into the forms without segregation
and then it shall be tamped and spaded or mechanically vibrated
for thorough consolidation. Low roll or mountable curbs may be '
formed without the use of a face form by using a straightedge and
templet to form the curb face. When used, face forms shall be
removed as soon as possible to permit finishing. Front and back '
forms shall be removed without damage to the concrete after it has
set.
FINISHING
The plastic concrete shall be finished smooth, if necessary, by
means of a wood float and then it shall be given a final surface
texture using a light broom or burlap drag. Concrete that is
adjacent to forms and formed joints shall be edged with a suitable
edging tool to the dimension shown on the plans. ,
JOINTING
Contraction Joints
Transverse weakened-plane contraction joints shall be con-
structed at right angles to the curb line at intervals not
exceeding 15 feet. Joint depth shall average at least z of the
cross section of the concrete.
Contraction joints may be sawed, hand-formed, or made by 1/8
inch thick division plates in the formwork. Sawing shall be done
early after the concrete has set to prevent the formation of
uncontrolled cracking. The joints may be hand-formed either by
(1) using a narrow or triangular jointing tool or a thin metal
blade to impress a plane or weakness into the plastic concrete,
or (2) inserting 1/8 inch thick steel strips into the plastic
concrete temporarily. Steel strips shall be withdrawn before
final finishing of the concrete. Where division plates are used
to make contraction joints, the plates shall be removed after
the concrete has set and while the forms are still in place.
Concrete 2
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Expansion Joints
Expansion joints shall be constructed at right angles to the
curb line at immovable structures and at points of curvature for
short-radius curves. Filler material for expansion joints shall
conform to requirements of ASTM D994, D1751, or D1752 and shall
be furnished in a single 3/4 inch thick piece for the full depth
and width of the joint.
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Expansion joints in a slipformed curb or curb and gutter shall
be constructed with an .appropriate hand tool by raking or sawing
through partially set concrete for~the full depth and width of
the section. The cut shall be only wide enough to permit a snug
fit for the joint filler. After the filler is placed, open areas
adjacent to the filler shall be filled with concrete and then
troweled and edged.
Alternatively, an expansion joint may be installed by removing a
short section of freshly extruded curb and gutter immediately,
installing temporary holding forms, placing the expansion joint
filler, and replacing and reconsolidating the concrete that was
removed. Contaminated concrete shall be discarded.
Other Joints
Construction joints may be either butt- or expansion-type
joints. Curbs or combined curbs and gutters constructed adjacent
to existing concrete shall have the same type of joints as in
the existing concrete, with similar spacing; however, contrac-
tion joint spacing shall not exceed 15 feet. Curbing placed in
conjunction with concrete paving shall be jointed according to
the type of joint indicated on the plan and profile.
PROTECTION
The Contractor shall always have material available to protect the
surface of the plastic concrete against rain. These materials
shall consist of waterproof paper or plastic sheeting. For
slipform construction, materials such as wood planks or forms to
protect the edges shall also be required.
When concrete is being placed in cold weather and the temperature
may be expected to drop below 35 degrees F., suitable protection
shall be provided to keep the concrete from freezing until it is
at least 10 days old. Concrete injured by frost action shall be
removed and replaced at the Contractor's expense.
CURING
Concrete shall be cured for at least three days after placement to
protect it against loss of moisture, rapid temperature change, and
mechanical injury. Moist burlap, waterproof paper, white polyethy-
Concrete 3
0
lene sheeting, white liquid membrane compound, or a combination '
thereof may be used as the curing material. Membrane curing shall
not be permitted in frost-affected areas when the concrete will be
exposed to deicing chemicals within 30 days after completion of
the curing period.
BACKFILLING
After the concrete has set sufficiently, the spaces in front and
back of curbs shall be refilled with suitable material to the
required elevations. The fill material shall be thoroughly tamped
in layers. It shall be the Contractor's responsibility to protect
the curbing during all phases of the backfilling operation. Any '
curbing damaged during this process shall be removed and replaced
at the Contractor's expense.
TESTING
Not less than three test cylinders of standard size and
manufacture shall be made for each 50 cubic yards of concrete '
placed, or for each day's operations unless otherwise directed by
the Engineer. One cylinder from each set shall be tested at seven
days and one cylinder at 28 days, in accordance with ASTM C-31.
The third cylinder shall be retained
as
a spare in case problems ,
occur with the other two.
Air entrainment and slump tests shall be taken on each load prior '
to placement.
To cast the cylinders, fill the molds in three equal layers and
uniformly rod each layer 25 times with a bullet-nosed rod. When '
rodding the second and third layers, the rod should just break
through into the layer beneath. The molds should be filled
continuously and without interruption. After rodding the top '
layer, tap the cylinder lightly to close any voids that might have
a trowel, and cover immediately to prevent loss of moisture. Be
sure the cylinders are on a level surface during curing and that '
the tops are smooth and level to ensure minimum laboratory
preparation and the best test results.
Test results indicating concrete substandard from the above
requirements shall be reason for halting concreting operations and
investigation of the cause of the deficiency, and removal and
replacement of concrete placed during the period represented by '
the test, if, in the opinion of the Engineer, such action is
necessary to protect the structural integrity of the construction.
,
All testin shall be done at the Contractor's expense by an
approved testing laboratory Test results shall be submitted once
a week to the Engineer. '
Concrete 4 ,
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STANDARD
UTILITIES SPECIFICATIONS
FOR
Watermain and Service Line
Installation
and
Sanitary Sewer and Storm Sewer
Installation
Revised, 1988
Published By
CITY ENGINEERS ASSOCIATION
OF MINNESOTA
In Cooperation With
Associated General Contractors, Inc.
Consulting Engineers Council of Minnesota
Minnesota Public Works Association
Minnesota Society of Professional Engineers
Minnesota Underground Contractors Association
CONTENTS
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1
PART I STANDARD SPECIFICATIONS FOR WATERMAIN AND SERVICE LINE
INSTALLATION - 2611
26.11.1 Description ...................................... 1
2611.2 Materials ........................................ 2
A. Water Pipe Materials ................................ 2
B. Fire Hydrants ....................................... 3
C. Valves and Valve Housings ........................... 4
D. Water Service Pipe and Fittings ..................... 6
E. Polyethylene Encasement Material ..................... 7
F. Mortar .............................................. 7
G. Concrete ............................... .. 7
H. Granular Materials .................................. 7
I. Piling .............................................. 9
J. Insulation ........................................... 9
2611.3 Construction Requirements ........................ 9
A. General Provisions ................................... 9
B. Excavation and Preparation of Trench .................14
C. Installation of Pipe and Fittings ...................20
D. Connection and Assembly of Joints ...................25
E. Water Service Installations .........................27
F. Setting Valves, Hydrants, Fittings ~ Specials........30
G. Disinfection of Watermains ..........................31
H. Electrical Conductivity Test ........................32
I. Hydrostatic Testing of Watermains ...................33
J. Pipeline Backfilling Operations .................. ..35
K. Restoration of Surface Improvements .................36
L. Maintenance and Final Cleanup .......................38
M. Operational Inspection• ..............................39
2611.4 Method of Measurement • ...........................39
A. Water Pipe .................................... ....40
B. Valves ..............................................40
C. Corporation Stops ...................................40
D. Curb Stops ...........................................40
E. Hydrants ...................................... ....40
F. Air Vents ...........................................40
G. Rearrangement of Inplace Facilities .................40
H. Polyethylene Gray Iron Fittings ............... ....41
I. Ductile and Gray Iron Fittings ......................41
J. Access Structures ...................................41
K. Granular Materials ..................................41
L. Piling ..............................................41
M. Insulation ..........................................41
2611.5 Basis of Payment .................................42
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PART II STANDARD SPECIFICATIONS FOR SANITARY SEWER AND STORM
SEWER INSTALLATION.- 2621
2621.1 Description
2621.2 Materials
A. Sewer Pipe and Service Line Materials
B. Metal Sewer Castings
C. Precase Concrete Manhole and Catch Basin
D. Concrete
E. Mortar
F. Granular Materials
G. Piling
H. Insulation
2621.3 Construction Requirements
A. General Provisions
B. Excavation and Preparation of Trench
C. Installation of Pipe and Fittings
D. Appurtenance Installations
E. Sewer Service Installations
F. Manhole and Catch Basin Structures
G. Reconnecting Existing Facilities
H. Sanitary Sewer Leakage Testing
I. Pipeline Backfilling Operations
J. Restoration of Surface Improvements
K. Maintenance and Final Cleanup
L. Deflection Test
M. Televising
2621.4 Method of Measurement
A. Sewer Pipe
B. Manholes
C. Catch Basins
D. Outside Drop Connection
E. Service Connection
F. .Service Pipe
G. Special Pipe Fittings
H. Appurtenant Items
I. Granular Materials
J. Piling
K. Insulation
2621.5 Basis of Payment
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.2611.1 DESCRIPTION
' This work shall consist of the construction of water main
and building service pipelines utilizing plant fabricated pipe
and other appurtenant materials, installed for conveyance of
' potable water. The work includes the relocation or adjustment of
existing facilities as may be specified in the Plans, Specifica-
tions and Special Provisions.
Use
of the term "Plans, Specifications and Special
H
Provisions within this specification shall be construed to mean
' those documents which compliment, modify, or clarify these
specifications and are accepted as an enf
bl
orcea
e component of
the Contract or Contract Documents. All references to MnDOT
Specifications shall mean the latest published edition of the
' Minnesota Department of Transportation Standard Specifications
for Construction, as modified by any MnDOT Supplemental
advertisement for bids. All reference to other Specifications of
AASHTO, ASTM, ANSI, AWWA, etc. shall mean the latest published
' edition available on the date of advertisement for bids.
Service installations will be designated as either Branch
Service or Tap Service in accordan
ith
ce w
the standards set
forth herein.
' Tap Service installations shall include all water service
lines less than three inches nominal inside diameter pipe. The
component parts of a tap service installation shall include a
corporation stop coupling complete with water main tap and
' saddle where required; a curb stop coupling complete with
service box; and copper piping extending from the corporation
stop to the curb stop coupling and beyond to the property line
or to the limits as established by the En
inee
O
i
g
r.
ne
nch tap
service lines shall be installed as the standard wherever
another size is not specified in the Plans, Specifications, and
' Special Provisions.
Branch. Service installations shall include all water
service lines of three inches nominal inside diameter pipe and
larger. The component
arts
f
b
p
o
a
ranch service installation
shall include a tapping sleeve and valve or a branch 3-way and
gate valve complete with valve box, and piping extending from
' the water main connection to a hydrant, to the property line or
to the limits as specified by the Engineer.
All references to Gray Iron material shall be construed to
' include both Gray Iron and Ductile Iron products, except where
one or the other is specified, and all references to Polyvinyl
' Chloride pipe shall be construed to include only pressure pipe
complying with AWWA C-900
All referen
t
"
"
.
ces
o
structure
shall
include any man-made object that is not otherwise exempted by
special terminology or definition.
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2611.2 MATERIALS
All materials required for this work shall be new material
conforming to requirements of the reference specifications for
the class, kind, type, size, grade, and other details indicated
in the Contract. Unless otherwise indicated, all required
materials shall be furnished by the Contractor. If any options
are provided for, as to type, grade, or design of the material,
the choice shall be limited as may be stipulated in the Plans,
Specifications, or Special Provisions.
All manufactured products shall conform in detail to such
standard design drawings as may be referenced or furnished in
the Plans. Otherwise, the Owner may require advance approval of
material suppliers, product design, or other unspecified details
as it deems desirable for maintaining adopted standards.
At the request of the Engineer, the Contractor shall
submit, in writing, a list of materials and suppliers for
approval.
A Certificate of Compliance shall be furnished stating that
the materials furnished have been tested and are in compliance
with the specification requirements.
A Water. Pipe Materials
All pipe furnished for water main and branch line
installations shall be of the type, kind, size, and class
indicated for each particular line segment as shown in the
Plan and designated in the Contract Items. Wherever
connection of dissimilar materials or designs is required,
the method of joining and any special fittings employed
shall be subject to approval of the Engineer.
Al Ductile Iron and Gray Iron Pipe and Fittings
The pipe and fittings furnished shall be of the Ductile
Iron or Gray Iron type as specified for each particular use
of installation. When Gray Iron is specified, either type
may be furnished. Gray -Iron may not be substituted for
Ductile Iron unless specifically authorized in the Special
Provisions.
Ductile iron pipe shall conform to the requirements of
ANSI A-21.51 (Ductile Iron Pipe Centrifugally Cast in Metal
Molds or Sand-Lined Molds). Gray iron pipe shall conform to
the requirements of ANSI A-21.6 (Cast Iron Pipe Centrifu-
gally Cast in Metal Molds) or to the requirements of ANSI
A.21.8 (Cast Iron Pipe Centrifugally Cast in Sand-Lined
Molds). In addition, the pipe shall comply with the
following supplementary provisions:
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' (1) Fittin s shall conform to th
g e requirements of ANSI
A-21.10 (Gray Iron and Ductile Iron Fittings) or ANSI
' A-21.53(Ductile Iron Compact Fittings) for the joint
type specified.
(2) Unless otherwise specified, all pipe and fittings
shall be furnished with cement mortar lining meeting
the requirements of ANSI A-21.4 for standard thickness
' lining. All exterior surfaces of the pipe and fittings
shall have an asphaltic coating at least one mil
thick. Spotty or thin seal coating, or poor coating
adhesion, shall be cause for rejection.
' A2 Concrete Pressure Pipe and Fittings
' Concrete pressure pipe, fittings and specials shall
conform to the requirements of AWWA C-301 (Prestressed
Concrete Pressure Pipe, Steel Cylinder Type) for the size,
working pressure, external loading, laying condition, and
other design considerations indicated in the Plans,
Specifications, and Special Provisions.
' The Contractor shall furnish plans and specifications to
'the pipe manufacturer giving such special details and other
information as are necessary for manufacture of the pipe,
' fittings, and specials in accordance with the specific
requirements of the project.
' A3 Polyvinyl Chloride (PVC) Pressure Pipe
Polyvinyl chloride (PVC) pressure pipe, produced by a
' continuous extrusion process employing a prime grade of
unplasticized polyvinyl chloride, shall conform to the
requirements of AWWA C-900 for the size, grade, and
pressure class indicated on the Plans, Specifications, and
' Special Provisions. The grade used shall be resistant to
aggressive soils or corrosive substances in accordance with
the requirements of ASTM D-543. Unless otherwise specified,
' the dimensions and tolerances of the pipe barrel should
conform to ductile iron or cast iron pipe equivalent
outside diameters.
B Fire Hydrants
Fire hydrants shall be of the type, size, and construc-
tion specified in the Plans and shall conform to the
applicable requirements of AWWA C-502.
' U
l
n
ess otherwise specified in the Plans, Specifications,
and Special Provisions, hydrants shall be furnished in
' conformance with the following supplementary requirements:
- 3 -
n
(1) Hydrants shall have a five-inch (nominal diameter
main valve opening of the type that opens against
water pressure. ,
(2) Hydrant barrels shall be two piece, non-jacket type,
with flanged joint above finished grade line and
with mechanical joint connection at the hub end for
joining a six-inch ductile iron branch pipe.
(3) Hydrant bury length, measured from the bottom of the
branch pipe connection to the finished ground line
at the hydrant, shall be 7'6".
(4) Hydrants shall have two outlet nozzles for 2'-z-inch
(I.D.) hose connection and one outlet nozzle for
4-inch (I.D.) steamer connection. All outlet nozzle
threads shall be National Standard Fire-Hose Coup-
ling Screw Threads (NFPA 1963).
(5) Hydrant operating mechanisms shall be provided with
"O" ring seals preventing entrance of moisture and
shall be lubricated through an opening. in the
operating nut or bonnet.
(6) Hydrants shall be provided with outlets for drainage
in the base or barrel, or between the base and
barrel, unless the Special Provisions require that
drain outlets be omitted or plugged.
(7) The hydrant operating nut shall be rotated counter-
clockwise to open.
(8) Detailed drawings, catalog information, and mainten-
ance data shall be furnished as requested by the
Engineer.
C Valves and Valve Housings
C1 Valve Housings
Valve housings shall be of ductile or cast iron or
masonry construction, as specified in the Plans, Specifi-
cations, and Special Provisions for the particular valve
size or installation. Masonry manhole or vault type
housings shall be constructed in accordance with the
provisions of MnDOT Specification 2506. Ductile or cast
iron valve boxes and all castings for manhole or vault
type housings shall conform to the requirements of MnDOT
Specification 3321.
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C2 Gate Valves
Gate Valves shall be manufactured and furnished in
accordance with an approved pattern and shall conform to
all applicable requirements of AWWA C-,500 or AWWA C-509,
together with such supplementary requirements as may be
covered in the Plans, Specifications, and Special Provi-
sions or the provisions hereof. Unless otherwise speci-
fied, the gate valves furnished shall comply with the
following supplementary requirements:
(1) Gate valves meeting the requirements of AWWA C-500
shall be two-faced, double disc type, with parallel
seats. Gate valves meeting the requirements of AWWA
C-509 shall be single disc type with resilient seat
bonded or mechanically attached to either the gate
or valve body. All valves shall be provided with a
two-inch square operating nut opening counterclock-
wise and mechanical joint ends.
(2) All gate valves shall be non-rising stem type
furnished with 0-Ring stem seals.
(3) All gate valves 16 inches or larger in size shall be
arranged for operation in the horizontal position
and shall be equipped with bypass valves.
(4) All gate valves 12 inches or larger in size shall be
equipped with approved barrel type rugged gate
position indicators.
(5)- All gears on gate valves shall be cut tooth steel
gears, housed in heavy ductile or cast iron extended
type grease cases of approved design.
(6) All gate valves shall have an open indicating arrow,
the manufacturer's name, pressure rating and year of
manufacture cast on the valve bodies.
(7) Upon request, three certified copies of the perfor-
mance tests complying with Section. 5 of the AWWA
C-500 or Section 6 of AWWA C-509 shall be submitted
to the Engineer.
C3 Butterfly Valves
Butterfly valves shall be manufactured in conformance
with all applicable requirements of AWWA C-504 for 150
p.s.i. working pressure minimum, together with such
supplementary requirements as may be covered in the Plans,
Specifications, and Special Provision or the provisions
hereof. Unless otherwise specified, the butterfly valves
- 5 -
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furnished shall comply with the following supplementary
requirements.
(1) The butterfly valves shall be short body of ductile ,
or cast iron with mechanical joint ends.
(2) -The butterfly valves shall be rubber seated with 1
ductile or cast disc, non-rising stem type furnished
with O-ring stem seals.
(3) The butterfly valves shall be equipped with a
two-inch square operating nut opening counterclock-
wise.
(4) The butterfly valves shall be designed for direct
burial installation.
(5) All butterfly valves shall have an open indicating
arrow, the manufacturer's name, pressure rating and
year of manufacture on the valve bodies.
D Water Service Pipe and Fittings
Water service pipe of 3 inches or larger inside
diameter shall conform to the requirements for Ductile and
Gray Iron Pipe and Fittings as set forth under the
provisions of 2611.2A1 and Polyvinyl Chloride Pressure
Pipe as set forth under the provisions of 2611.2A3.
Water service pipe of less than 3 inches in inside
diameter shall conform to the requirements of ASTM B 88
for Seamless Copper Water Tube, Type K, Soft Annealed
temper.
Corporation stops, saddles, curb stops, and curb stop
service boxes shall be as detailed in the Plans,
Specifications, and Special Provisions or approved desig-
nations. All fittings for copper tubing shall be cast
brass, having uniformity in wall thickness and strength,
and shall be free of defects affecting serviceability. All
copper pipe fittings shall be flared or compression type.
All threads for underground service line .fittings shall
conform to the requirements of AWWA C-800. Each fitting
shall be permanently and plainly marked with the name or
trademark of the manufacturer.
Curb stop service shall be gray iron castings conform-
ing to the requirements of ASTM A 48 for Class 20 or
higher tensile strength and shall be adjustable up and
down for 7 feet of cover or to the depth specified in the
Plans, Specifications, and Special Provisions.
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C
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' E Polyethylene Encasement Material
Polyethylene encasement material shall conform to the
' requirements of AWWA C-105 for tube-type installation and
8 mil nominal film thickness.
F .Mortar
Mortar for use in masonry construction shall be an
air-entrained mixture of one part Portland cement and
three parts mortar sand
with
ffi
i
t
,
su
c
en
water added to
produce proper consistency, and with sufficient air-
entraining agent added to maintain an air content within
' the range of 7 to 10 percent.
' G Concrete
Concrete for cast-in-place masonry construction shall
be produced and furnished in accordance with the provi-
' sions of MnDOT Specification 2461 for the mix design
indicated in the Plans, Specifications, or Special
Provisions. The requirements for Grade B concrete shall be
' met where a higher grade is not specified. Type 3
(air-entrained) concrete
h
ll b
f
s
a
e
urnished and used in
all structures having weather exposure.
H
Granular Materials
Granular materials furnished for foundation, bedding,
encasement, backfill
or other pur
oses a
b
,
p
s may
e
specified, shall consist of any natural or synthetic
material aggregate such as sand, gravel, crushed rock,
' crushed stone, or slag, that shall be so graded as to meet
the. gradation requirements specified herein for each
particular use.
'
H1 Granular Material
Gradation Classifications
II
II
II
u
u
i~
Granular materials furnished for use in Foundation,
Bedding, Encasement, or Backfill construction shall
conform to the following requirements:
Percent Passing
Sieve Size
3 Inch
2 Inch
1 Inch.
3/4 Inch
3/8 Inch
No. 4
No. 10
No. 40
No. 200
Material Use Designation
Foundation Bedding Encasement Backfill
100
100 100 100
85-100 90-100 90-100
30- 60 50- 90 50- 90
0- 10 35- 80 35- 80 35-100
20- 65 20- 65 20-100
0- 35 0- 35 0- 35
0- 10 0- 10 0- 10
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H2 Granular Material Use Designations
Granular materials provided for Foundation, Bedding,
Encasement, or Backfill use as required by the Plans,
Specifications, and Special Provisions, either as part of
the pipe item work unit or as a separate contract item,
shall be classified as to use in accordance with the
following:
Material Use Designation
Zone Designation
Granular Foundation ------------- Placed below the bottom
of pipe grade as re-
placement for unsuitable
or unstable soils, to
achieve better founda-
tion support.
Granular Bedding ---------------- Placed below the pipe
midpoint, prior to pipe
installation, to facili-
tate proper shaping and
to achieve uniform pipe
support.
Granular Encasement -------------
Placed below an eleva-
tion one foot above the
top of pipe, after pipe
installation, for pro-
tection of the pipe and
to assure proper filling
of voids or thorough
consolidation of back-
fill.
Granular Backfill ---------------
Placed below the surface
base course, if any, as
the second stage of
backfill, to minimize
trench settlement and
provide support for sur-
face improvements.
In each case above, unless otherwise indicated, the
lower limits of any particular zone shall be the top
surface of the next lower course as constructed. The upper
limits of each zone are established to define variable
needs for material gradation and compaction or void
content, taking into consideration the sequence of
construction and other conditions. The material use and
zone designations described above shall only serve to
fulfill the objectives and shall not be construed to
restrict the use of any particular material in other zones
where the gradation requirements are met.
0
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I Piling
Piling shall be constructed in
provisions of MnDOT Specification
details relating to piling.
J Insulation
accordance with the
2452 and special plan
Main insulation shall be extruded rigid board material
having a thermal conductivity of 0.23 BTU/hour/square
foot/degree Fahrenheit/per inch thickness, maximum, at 40°
F mean, a compressive strength of 35 psi minimum, and
water absorption of 0.25 percent by volume maximum.
Unless otherwise specified in the Plans,. Specifica-
tions, and Special Provisions, board dimensions shall
measure 8 feet long, 2 or 4 feet wide, and 1 or 1'-z inches
thick.
2611.3 CONSTRUCTION REQUIREMENTS
A General Provisions
Al Maintenance of Traffic
Whenever work interferes with the flow of traffic along
a roadway, the Contractor shall provide for traffic
control and signing and public safety in accordance with
the provisions of Appendix B of the Minnesota Manual of
Uniform Traffic Control Devices and MnDOT Specifications
1404 and 1710, and the Special Provisions. Neither road
closures nor detours shall be permitted unless specified
in the Special Provisions or authorized by the Engineer.
Where road closures or detours are permitted by the
Engineer, the Engineer shall determine the appropriate
agencies, boards, or departments the Contractor must
notify prior to taking the action and the proper advance
notice to be provided to each body.
Compliance with this requirement shall not be con-
strued to relieve the Contractor from the responsibility
of notifying agencies or institutions whose services may
be predicated upon a roadway being opened to traffic or
whose services would be hindered if a roadway is closed to
traffic. Such agencies or institutions shall include, but
not be limited to, the police department, the fire
department, municipal bus service, school bus service, and
ambulance service. The Contractor shall keep the required
agencies informed of changing traffic patterns and detour
situations.
~ 9_
AZ Establishing Line and Grade r
Unless otherwise specified in the Plans, Specifica-
tions, and Special Provisions, the watermain shall '
generally be placed with 7 feet of cover. However, a
slightly greater depth may be required to clear existing
storm and sanitary sewers and sewer services, and no '
additional compensation shall be provided for such
adjustments.
In certain locations where the watermain is in direct r
conflict with storm or sanitary sewer, the watermain shall
be constructed under the sewer. Where it is necessary to
use vertical bends to avoid sewer mains, no extra
compensation will be made for this construction. However,
fittings will be a unit of measurement and payment.
No deviation shall be made from the required line or
grade except with the consent of the Engineer.
Watermains crossing above-house sewers, storm sewers,
or sanitary sewers shall be laid to provide a separation
of at least 18 inches between the bottom of the watermain
and the top of the sewer. When local conditions prevent a
vertical separation as described, the following construc-
tion shall be used:
(1) Sewers passing over or under watermains shall be
constructed of materials equal to watermain standards
of construction for a distance of at least 9 feet on
either side of the watermain.
(2) Watermain passing under sewers shall, in addition, be
protected by providing:
a vertical separation of at least 18 inches between
the bottom of the sewer and the top of the watermain;
adequate structural support for the sewers to prevent
excessive deflection of joints and settling on and
breaking of the watermains;
that the length of water pipe be centered at the
point of crossing so that the joints will be
equidistant and as far as possible from the sewer.
Watermains shall be laid at least 10 feet horizontally
from any sanitary sewer, storm sewer or sewer manhole,
whenever possible. When local conditions prevent a
horizontal separation of 10 feet, a watermain may be laid
closer to a storm or sanitary sewer provided that:
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' (1) the bottom of the watermain is at least 18 inches
above the top of the sewer;
' (2) where this vertical separation cannot be obtained,
the sewer shall be constructed of materials and with
joints that are equivalent to watermain standards of
' construction and shall be pressure tested to assure
watertightness prior to backfilling.
' ,.The primary line and grade will be established by the
Engineer. For trench installation, line and grade stakes
' will be set parallel to the proposed pipeline at an
appropriate offset therefrom as will best serve the
Contractor's operations wherever practical. For tunnel
installation, line and grade stakes will be set directly
' above the proposed pipeline setting. Grade and line stakes
will be set at 25-foot intervals along the pipeline; at
each change in line or grade; and as needed for pipeline
' appurtenances and service lines.
The Contractor shall arrange operations to avoid
unnecessary interference with the establishment of the
primary line and grade stakes; and shall render whatever
assistance may be required by the Engineer in accomplish-
ing the staking. The Contractor shall be responsible for
preservation of the primary stakes and, if negligent in
providing necessary protection, shall bear the full cost
of any restaking.
' The Contractor shall be solely responsible for the
correct transfer of the primary line and grade to all
working points and for construction of the work to
prescribed lines and grades as established b the
the
y
Engineer. Following construction of a work shaft on
tunnel installations, the line and grade shall be
' transferred down the shaft and be projected into and
throughout the length of each tunnel heading.
t A3 Protection of Surface Structures
All surface structures and features located outside the
permissible excavation limits for underground installa-
tions, together with those within the construction areas
which are indicated in the Plans as being saved, shall be
properly protected against damage and shall not be
disturbed or removed without approval of the Engineer.
Within the construction limits, as required, the removal
of improvements such as paving, curbing, walks, turf,
' etc., shall be subject to acceptable replacement after
completion of underground work, with all expense of
removal and replacement being borne by the Contractor to
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the extent that separate compensation is not specifically
provided for in the contract.
Obstructions such as street signs, guard posts, small
culverts, and other items of prefabricated construction,
may be temporarily removed during construction, provided
that essential service is maintained in a relocated
setting as approved by the Engineer, and that nonessential
items are properly stored for the duration of construc-
tion. Upon completion of the underground work, all such
items shall be replaced in their proper setting at the
sole expense of the Contractor.
In the event of damage to any surface improvements,
either privately or publicly owned, in the absence of
construction necessity, the Contractor will be required to
replace or repair the damaged property to the satisfaction
of the Engineer and without cost to the Owner.
A4 Interference of Underground Structures
When .any underground structure interferes with the
planned placement of the pipeline or appurtenances to such
an extent that alterations in the work are necessary to
eliminate the conflict or avoid endangering effects on
either the existing or proposed facilities, the Contractor
shall immediately notify the Engineer and the Owner of the
affected structure. When any existing facilities are
endangered by the Contractor's operations, the Contractor
shall cease work at the site and take such precautions as
may be necessary to protect the inplace structures until a
decision is made as to how the conflict will be resolved.
Without specific authorization from the Engineer, no
essential utility service shall be disrupted, nor shall
any change be made in either the existing structures or
the planned installations to overcome the interference.
Alterations in existing facilities will be allowed only to
the extent that service will not be curtailed unavoidably
and then only when the encroachment or relocation will
satisfy all applicable regulations and conditions.
Wherever alterations are required. as a result of
unforeseen underground interferences not due to any fault
or negligence of the Contractor, the Engineer will issue a
written order covering any additional or extra work
involved and specifying the revised basis of payment, if
any. Any alterations made strictly for the convenience of
the Contractor, shall be subject to prior approval and
shall be at the Contractor's expense.
No extra compensation will be allowed for delays caused
by the interference of underground structures.
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A5 Removal of Surface Improvements
' Removal of surface improvements in connection with
trench excavation shall be limited to actual needs for
installation of the pipeline and appurtenances, based on
' the allowable trench widths and any other controls imposed
in connection with the work. Removal operations shall be
coordinated effectively with the excavation and installa-
' tion operations as will cause the least practical
disruption of traffic or inconvenience to the public. The
debris resulting from removals shall become the property
of the Contractor and shall be disposed of by the
' Contractor. Removal debris shall not be deposited at
locations that will block access to fire hydrants, private
driveways, or other essential service areas, nor obstruct
surface drainage. Removal and final disposal of debris
shall be accomplished as a single operation wherever
possible and, in any event, the debris shall be removed
' from the site before starting the excavating operations.
Removal of concrete or bituminous structures shall be
by methods producing clean-cut breakage to prescored lines
' as will preserve the remaining structure without damage.
Removal equipment shall not be operated in a manner that
will cause damage to the remaining or adjoining property.
Where not removed to an existing joint, concrete struc-
' tures shall be sawed along the break lines to a minimum
depth of one-third of the structure depth.
' Any reusable materials generated during the work, such
as aggregate, sod, topsoil, shall be segregated from other
waste materials and be stockpiled so as to maintain
' suitability and permit proper reuse.
The use of drop weight equipment for breaking pavement
1 will be allowed to the extent that the Contractor shall
assume full responsibility for an
dama
es caused th
b
y
g
ere
y.
The pavement breaking operation shall not be allowed to
become a nuisance to the public or a source of damage to
underground or adjacent structures. The Engineer reserves
the right to order discontinuance of drop weight breaking
operations at any time.
i
A6 Temporary Service Measures
' While any open excavations are maintained, the Contrac-
tor shall have available a supply of steel plates,
suitable for temporary bridging of open trench sections
where either vehicular or pedestrian traffic must be
maintained. Use of the plates shall be
di
t
d
as
rec
e
or
approved by the Engineer, and where installed they shall
' be secured against possible displacement and be replaced
with the permanent structure as soon as possible.
- 13 -
B Excavation and Preparation of Trench ,
Bl Operational Limitations and Requirements
Excavating operations shall proceed only so far in
advance of pipe laying as will satisfy the needs for
coordination of work and permit advance verification of
unobstructed line and grade as planned. Where interference '
with existing structures is possible, or in any way
indicated, and where necessary to establish elevation or
direction for connections to inplace structures, the
excavating shall be done at those locations in advance of
the main operation so actual conditions will be exposed in
sufficient time to make adjustments without resorting to '
extra work or unnecessary delay.
All installations shall be accomplished by open trench
construction except for short tunnel sections approved by
the Engineer and with the exception that boring and
jacking or tunnel construction methods shall be employed
where so specifically required by the Plans, Specifica-
tions, or Special Provisions. Installation of pipe through
tunnel excavations will be allowed only where the surface
structure can be properly supported and the backfill '
restored to the satisfaction of the Engineer.
The excavating operations shall be conducted so as to
carefully expose all inplace underground structures '
without damage. Wherever the excavation extends under or
approaches so close to an existing structure as to
endanger it in any way, precautions and protective '
measures shall be taken as necessary to preserve the
structure and provide temporary support. Hand methods of
excavating shall be utilized to probe for and expose such
critical or hazardous installations as gas pipe and power
or communication cables.
The Engineer shall be notified of any need for blasting '
to remove materials which cannot be broken up mechanical-
ly, and there shall be no blasting operations conducted
until the Engineer's approval has been secured. Blasting '
will be allowed only when proper precautions are taken to
protect life and property, and then shall be restricted as
the Engineer directs. The Contractor shall assume. full
responsibility for any damages caused by blasting,
regardless of the requirements for notification and
approval. The Contractor shall secure any required permits
for blasting and shall conduct blasting .operations in '
conformance with all applicable state and local laws,
regulations and ordinances.
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B2 Classification and Disposition of Materials
Excavated materials will be classified for payment only
' to the extent that the removal of materials classified by
the Engineer as Rock will be paid for separately from
other unclassified materials, either as a separate
' Contract Item or as an Extra Work Item when no bid price
is applicable. All other materials encountered in the
excavations, with the exception of items classified for
' payment as structure removals, will be considered as
Unclassified Excavation and unless otherwise specified in
the Plans, Specifications, and Special Provisions, no
additional compensation shall be provided for their
' removal. Unclassified materials shall include muck,
rubble, wood debris, and boulder stone, masonry or
concrete fragments less than one cubic yard in volume,
' together with other miscellaneous matter that can be
removed effectively with power operated excavators without
resorting to drilling and blasting.
' Rock excavation shall be defined to include all hard,
solid rock in ledge formation, bedded deposits and
unstratified masses; all natural conglomerate deposits so
' firmly cemented as to present all the characteristics of
solid rock; and any boulder stone, masonry or concrete
fragments exceeding one cubic yard in volume. Materials
such as shale, hard pan, soft or disintegrated rock which
' can be dislodged with a hand pick or removed with a power
operated excavator, will not be classified as Rock
Excavation.
Excavated materials will be classified for reuse as
being either Suitable or Unsuitable for backfill or other
specified use, subject to selective controls. All suitable
materials shall be reserved for backfill to the extent
needed, and any surplus remaining shall be utilized for
other construction on the project as may be specified or
' ordered by the Engineer. To the extent practicable,
granular materials and topsoil shall be segregated from
other materials during the excavating and stockpiling
operations so as to permit best use of the avail
bl
a
e
materials at the time of backfilling. Unless otherwise
specified in the Plans, Specifications, and Special
' Provisions, material handling as described above shall be
considered incidental with no additional compensation
provided therefor.
L All excavated materials reserved for backfill or other
use on the project shall be stored at locations approved
by the Engineer that will cause a minimum of inconvenience
to public travel, adjacent properties, and other special
interests. The materials shall not be deposited so close
to the edges of the excavations as would create hazardous
- 15 -
0
conditions, nor shall any material be placed so as to
block the access to emergency services. All materials
considered unsuitable by the Engineer, for any use on the
project, shall be immediately removed from the project and '
be disposed of as arranged for by the Contractor at no
extra cost to the Contract.
,
B3 Excavation Limitations and Requirements
Trench excavating shall be to a depth that will permit
preparation of the foundation as specified and installa-
tion of the pipeline and appurtenances at the prescribed
line and grade, except where alterations are specifically
authorized. Trench widths shall be sufficient to permit
the pipe to be laid and joined properly and the backfill
to be placed and compacted as specified. Extra width shall
be provided as necessary to permit convenient placement of '
sheeting and shoring and to accommodate placement of
appurtenances.
'
Excavations shall be extended below the bottom of
structure as necessary to accommodate any required
Granular Foundation material. When rock or unstable
foundation materials are encountered at the established
grade, additional materials shall be removed as specified
or ordered by the Engineer to produce an acceptable
foundation. Unless otherwise indicated or directed, rock ,
shall be removed to an elevation at least six inches below
the bottom surface of the pipe barrel and below the lowest
projection of joint hubs. All excavations below grade ,
shall be to a minimum width equal to the outside pipe
diameter plus two feet. Rock shall be removed to such
additional horizontal dimensions as will provide a minimum
clearance of six inches on all sides of appurtenant
structures such as valves, housings, access structures,
etc.
Where no other grade controls are indicated or
established for the pipeline, the excavating and founda-
tion preparations shall be such as to provide a minimum ,
cover over the top of the pipe as specified. Trench widths
shall allow for at least six inches of clearance on each
side of the joint hubs. The maximum allowable width of the
trench at the top of pipe level shall be the outside ,
diameter of the pipe plus two feet, subject to the
considerations for alternate pipe loading set forth below.
The width of the trench at the ground surface shall be
held to a minimum to prevent unnecessary destruction of
the surface structures.
The maximum allowable trench width at the level of the
top of pipe may be exceeded only by approval of the
- 16 -
' Engineer, after consideration of pipe strength and loading
relationships. Any alternate proposals made by the
Contractor shall be in writing, giving the pertinent soil
' weight data and proposed pipe st rength alternate, at least
seven days prior to the desired date of decision. Approval
of alternate pipe designs shall be with the understanding
' that there will be no extra compensation allowed for any
increase in material or construction costs.
' If the trench is excavated to a greater width than that
authorized, the Engineer may direct the Contractor to
provide a higher class of bedding and/or a higher strength
pipe than that required by the Plans, Specifications, and
Special Provisions in order to satisfy design requirements
' without additional compensation therefor.
' B4 Sheeting and Bracing Excavations
All excavations shall be sheeted, shored, and braced as
will meet all requirements of the applicable safety codes
' and regulations; comply with any specific requirements of
the Contract; and prevent disturbance or settlement of
' adjacent surfaces, foundations, structures, utilities, and
other properties. Any damage to the work under contract or
to adjacent structures or property caused by settlement,
water or earth pressures, slides, cave-ins, or other
' causes due to failure or lack of sheeting, shoring, or
bracing or through negligence or fault of the Contractor
in any manner, shall be repaired at the Contractor's
expense and without delay.
Where conditions warrant extreme care, the Plans,
~~ Specifications, and Special Provisions may require special
precautions to protect life or property, or the Engineer
..may order the installation of sheet piling of the
interlocking type or direct that other safety measures be
taken as deemed necessary. Failure of the Engineer to
order correction of improper or inadequate sheeting,
shoring, or bracing shall not relieve the Contractor's
responsibilities for protection of life, property, and the
' work.
The Contractor shall assume full- responsibility for
proper and adequate placement of sheeting, shoring, and
bracing, wherever and to such depths that soil stability
may dictate the need for support to prevent displacement.
Bracing shall be so arranged as to provide ample working
space and so as not to place stress or strain on the
inplace structures to any extent that may cause damage.
' Sheeting, shoring and bracing materials shall be
removed only when and in such manner as will assure
- 17 -
C
ade
uate
rotection
f th
i
l '
q
p
o
e
np
ace structures and prevent
displacement of supported grounds. Sheeting and bracing
shall be left in place only as required by the Plans,
Specifications, and Special Provisions or ordered by the '
Engineer. Otherwise, sheeting and bracing may be removed
as the backfilling reaches the level of respective
support. Wherever sheeting and bracing is left in place,
the upper portions shall be cut and removed to an
elevation of three feet or more below the established
surface grade as the Engineer may direct. '
All costs of furnishing, placing and removing sheeting,
shoring, and bracing materials, including the value of
materials left in place as required by the Contract, shall '
be included in the prices bid for pipe installation and
will not be compensated for separately. When any sheeting
,
shoring, or bracing materials are left in place by written
,
order of the Engineer, in the absence of specific
requirements of the Contract to do so, payment will be
made for those materials as an Extra Work Item, including
waste material resulting from upper cut-off requirements.
B5 Preparation and Maintenance of Foundations ,
Foundation preparations shall be conducted as necessary
to produce a stable foundation and provide continuous and
uniform pipe bearing between bell holes. The initial
excavating or backfilling operations shall produce a
subgrade level slightly above finished grade as will
permit hand shaping to finished grade by trimming of high
spots and without the need for filling of low spots to
grade. Final subgrade preparations shall be such as to
produce a finished grade at the centerline of the pipe
that is within 0.03 foot of a straight line between pipe
joints and to provide bell hole excavation at each joint
as will permit proper joining of pipe and fittings.
In excavations made below grade to remove rock or
unstable materials, the backfilling to grade .shall be made
with available suitable materials unless placement of ,
Granular Foundation or Bedding material is specified and
provided for, or is ordered by the Engineer as an Extra
Work Item. Placement of the backfill shall be in
relatively uniform layers not exceeding 8 inches in loose
thickness. Each layer of backfill shall be compacted
thoroughly, by hand or by means of approved mechanical
compaction equipment, as will produce uniform pipe support '
throughout the full .pipe length and facilitate proper
shaping of the pipe bed.
Where th
f
d '
e
oun
ation soil is found to consist of
materials that the Engineer considers to be so unstable as
- 18 -
' to preclude removal and replacement to a reasonable depth
to achieve solid support, a suitable foundation shall be
' constructed as the Engineer directs in the absence of
special requirements therefor in the Plans, Specifica-
tions, and Special Provisions. The Contractor may be
' required to furnish and drive piling and construct
concrete or timber bearing supports or other work as may
be provided for in an Extra Work order.
Care shall be taken during final subgrade shaping to
prevent any over-excavation. Should any low spots develop,
they shall only be filled with approved material, which
' shall have optimum moisture content and be compacted
thoroughly without additional compensation to the Contrac-
tor. The finished subgrade shall be maintained free of
water and shall not be disturbed during pipe lowering
operations, except as necessary to remove pipe slings. The
discharge of trench dewatering pumps shall be directed to
natural drainage channels or storm water drains. Draining
' trench water into sanitary sewers or combined sewers will
not be permitted.
' The Contractor shall install and operate a dewatering
system of wells or points to maintain pipe trenches free
of water wherever necessary, or as directed by the
' Engineer to meet the intent of these Specifications.
Unless otherwise specified in the Plans, Specifications
,
and Special Provisions, such work shall be considered
incidental with no additional compensation provided
' therefor.
All costs of excavating below grade and placing
foundation or bedding aggregates as required, shall be
' included in the bid prices for pipe items to the extent
that the need for such work is indicated in the Contract
provisions and the Proposal does not provide for payment
therefor under separate Contract Items
Any excavation
.
below grade and any foundation or bedding aggregates
required by order of the Engineer in the absence of
' Contract requirements therefor, will be compensated for
separately as Extra Work Items.
If examination by the Engineer reveals that the need
for placement of foundation aggregate was caused by the
Contractor's manipulation of the soils in the presence of
excessive moisture or lack of proper dewatering, the cost
' of the corrective measures shall be borne by the
Contractor.
' - 19 -
1
C Installation of Pipe and Fittings ,
C1 Inspection and Handling
Proper and adequate implements, tools, and facilities '
satisfactory to the Engineer shall be provided and used by
the Contractor for the safe and convenient prosecution of
the work. During the process of unloading, all pipe and '
accessories shall be inspected by the Contractor for
damage. The Contractor shall notify the Engineer of all
material found to have cracks, flaws or other defects. The
Engineer shall inspect the damaged material and have the '
right to reject any materials found to be unsatisfactory.
The Contractor shall promptly remove all rejected material
from the site. '
All materials shall be handled carefully, as will
prevent damage to protective coatings, linings, and joint
fittings; preclude contamination of interior areas; and
avoid jolting contact, dropping, or dumping.
While suspended and before being lowered into laying
position, each pipe section and appurtenant unit shall be
inspected by the Contractor to detect damage or unsound
conditions that may need corrective action or be cause for ,
rejection. The Contractor shall inform the Engineer of any
defects discovered and the Engineer will prescribe the
required corrective actions or order rejection. ,
Immediately before placement, the joint surfaces of
each pipe section and fitting shall be inspected for the
presence of foreign matter, coating blisters, rough edges '
or projections, and any imperfections so detected shall be
corrected by cleaning, trimming, or repair as needed.
C2 Pipe Laying Operations
Trench excavation and bedding preparations shall
proceed ahead of pipe placement as will permit proper
placement and joining of the pipe and fittings at the
prescribed grade and alignment without unnecessary hind- '
rance. All foreign matter or dirt shall be removed from
the inside of the pipe and fittings before they are
lowered into position in the trench, and they shall be
kept clean by approved means during and after laying. The
water main materials shall be carefully lowered into
laying position by the use of suitable restraining
devices. Under no circumstances shall the pipe be dropped '
or dumped into the trench.
At the time of pipe placement, the bedding conditions '
shall be such as to provide uniform and continuous support
- 20 -
for the pipe between bell holes. Bell holes shall be
excavated as necessary to make the joint connections, but
they shall be no larger than would be adequate to support
the pipe throughout its length. No pipe material shall be
laid in water nor when the trench or bedding conditions
are otherwise unsuitable or improper.
When placement or handling precautions prove inade-
' quate, in the Engineer's opinion, the Contractor shall
provide and install suitable plugs or caps effectively
closing the open ends of each pipe section before it is
' lowered into laying position, and they shall remain so
covered until removal is necessary for connection of an
adjoining unit.
' As each length of bell and spigot pipe is placed in
laying position, the spigot end shall be centered in the
bell and the pipe forced home and brought to correct line
' and grade. The pipe shall be secured in place with
approved backfill material, which shall be thoroughly
compacted by tamping around the pipe to a height of at
' least 12 inches above its top. Acceptable tamping
techniques include hand tamping and use of hand operated
mechanical tamping devices.
' At all times when pipe laying is not in progress,
including noon hour and overnight periods, all open ends
of the pipe line shall be closed by watertight plugs or
other means approved by the Engineer. If water is present
in the trench, the seals shall remain inplace until the
trench is pumped completely dry.
i When connecting to existing stubs, the Contractor shall
take every precaution necessary to prevent dirt or debris
from entering the existing lines. All necessary work to
' make the connection shall be done at no additional
compensation, except where noted otherwise.
f C3 Aligning and Fitting of Pipe
' The cutting of pipe for inserting valves, fittings, or
closure pieces shall be done in a neat and workmanlike
manner without damage to the pipe and so as to leave a
smooth square-cut end. Pipe shall be cut with approved
' mechanical cutters. The electric-arc cutting method, using
carbon or steel rod., will be approved for use on larger
size ductile or gray pipe where mechanical cutters are not
available. Flame cutting will not be allowed under any
' conditions. All rough edges shall be removed from the cut
ends of pipe and, where rubber gasket joints are used, the
' outer edge shall
filing to produce be rounded or beveled by grinding
a smooth fit or
.
- 21 -
i~
Wherever it is necessary to deflect ductile or gray
iron pipe from a straight line either in the vertical or
horizontal plane, to avoid obstructions,. plumb stems, or
produce a long radius curve when permitted, the amount of
deflection allowed at each joint shall not exceed the
allowable limits for maintaining a satisfactory joint seal
as given in AWWA C-600 for mechanical joints and push-on
joints. The maximum angular deflection at any joint for
other pipe materials and joints shall not exceed the
manufacturer's recommendations. If the specified alignment
requires angular deflections greater than recommended or
allowed, the Contractor shall provide appropriate bends or
shorter pipes such that the maximum angular deflection is
not exceeded.
Connection and assembly of joints shall be accomplished
during the setting, aligning, and fitting operations, in
accordance with the provisions of Section 2611.2D, to the
extent that the jointing requirements will permit.
C4 Blocking and Anchoring of Pipe
All plugs, caps, tees, bends, and other thrust points
shall be provided with reaction backing, or movement shall
be prevented by attachment of suitable restraining
devices, in accordance with the requirements of the Plans,
Specifications, and Special Provisions.
In the absence of other specified requirements for
reaction backing or restraining devices, the following
provisions shall apply:
(1) All horizontal bends exceeding 20 degrees deflection,
and all caps, plugs, and branch tees shall be
provided with concrete buttress blocking.
(2) All vertical bends exceeding 20 degrees deflection
shall be provided with concrete buttress blocking at
the low points and with metal tie rods or strapping
restraints at the high points.
~_ l
~I~
J
1
7
u
n
(3) Offset bends made with standard offset fittings need
not be strapped or buttressed. ,
Hardwood blocking shall only
reaction backing until acceptat
blocking or restraining devices
Blocking shall be nominal 2-inch
equivalent to at least four times
of the cap or plug it restrains.
be used as temporary
ale permanent reaction
have been installed.
timber having an area
the area of the surface
- 22 -
Concrete buttresses shall be poured against firm,
undisturbed ground and shall be formed in such a way that
the joints will be kept free of concrete and remain
accessible for repairs. The concrete mix used in buttress
construction shall meet the requirements for Grade B of
MnDOT Specification 2461. Buttress dimensions shall be a
minimum of 12 inches in thickness, and the minimum area,
in square feet, shall be as follows:
1/32 Bend ~
PIPE SIZE TEE OR PLUG 1/4 BEND 1/8 BEND 1/16 BEND
6" 2.9 3.1 1.6 0.8
8" 3.7 5.3 2.9 1.4
10" 5.7 8.1 4.4 2.2
12" 8.1 13.4 6.6 3.2
16" 15.1 21.4 11.6 5.9
20" 23.2 30.2 18.1 9.3
24" 33.6 48.5 26.1 13.3
Contractors are instructed to size concrete buttress
blocking on fittings and dead ends where the blocking
must withstand the pressure of larger main line fittings
equipped with reducers, for the larger sized main line
thrust and not for smaller fitting size only. This is of
particular importance on tees and crosses where the main
size is reduced on the run from large to small size by
use of reducers.
All metal parts of tie rod or strap type restraints
shall be galvanized or coated with other approved
asphaltic type rustproofing.
All necessary fittings, bands, tie rods, nuts, and
washers, and all labor and excavation required for
installation of reaction restraints, shall be furnished
at the Contractor's expense with no direct compensation
provided therefor.
C5 Polyethylene Encasement of Pipeline
I~~
0
Wherever so required by the Plans, Specifications, or
Special Provisions, the pipeline, including valves, fit-
tings, and appurtenances, shall be fully encased in
polyethylene film of 8 mil nominal thickness. The film
shall be furnished in tube form for installation. on pipe
and all pipe-shaped appurtenances such as bends,
reducers, off-sets, etc. Sheet film shall be provided
and used for encasing all odd-shaped appurtenances such
as valves, tees, crosses, etc.
- 23 -
The polyethylene tubing shall be installed on the pipe e
prior to being lowered into the trench. Tubing length
shall be sufficient to provide a minimum overlap at all
joints of one foot or more. Overlap may be accomplished
with a separate sleeve
tube placed over one end of the '
pipe prior to connecting another section of pipe, or by
bunching extra overlap material at the pipe ends in
accordion fashion. After completing the pipe jointing and '
positioning the overlap material, the overlap shall be
secured in place with plastic adhesive tape wrapped
circumferentially around the pipe not less than three
turns. '
After encasement, the circumferential slack in the '
tubing film shall be folded over at the top of the pipe to
provide a snug fit along the barrel of the pipe. The fold
shall be held in place with plastic adhesive tape applied
at intervals of approximately three feet along the pipe '
length. Also, any rips, punctures, or other damage to the
tubing shall be repaired as they are detected. These
repairs shall be made with adhesive tape and overlapping '
patches cut from sheet or tubing material.
At odd-shaped appurtenances such as gate valves, the ,
tubing shall overlap the joint and be secured with tape,
after which the appurtenant piece shall be wrapped with a
flat firm sheet or split length of tubing by passing the
sheet under the appurtenance and bringing it up around the ,
body. Seams shall be made by bringing the edges together,
folding over twice, and taping down. Wherever encasement
is terminated, it shall extend for at least two feet
beyond the joint area.
Openings in the tubing for branches, service taps, air
valves and similar appurtenances shall be made by cutting
an X-shaped slit and temporarily folding back the film.
After installing the appurtenance, the cut tabs shall be
secured with tape and the encasement shall be completed as '
necessary for an odd-shaped appurtenance.
Unless otherwise specified in the Plans, Specifica- '
tions, and Special Provisions, hydrants encased in
polyethylene tubing shall have plugged drain outlets.
C6 Placement of Insulation
Rigid insulation board shall be placed within the pipe
encasement zone, 6 inches above the pipe. Prior to
placement of the insulation, encasement material shall be
compacted until there is no further visual evidence of ,
increased consolidation or the density of the compacted
layer conforms to the density requirements specified in
- 24 - '
the Special Provisions, then leveled and lightly scarified
to a depth of i inch. Encasement zone material placed below
the insulation shall be free of rock or stone fragments
measuring 12 inches or greater.
Insulation boards shall be placed on the scarified
material with the long dimension parallel to the centerline
of the pipe. Boards placed in a single layer shall be
overlapped at least 6 inches on all sides to eliminate
continuous joints for the full depth of the insulation. If
two or more layers of insulation boards are used, each layer
shall be placed to cover the joints of the layer immediately
below with an overlap of at least 6 inches.
The Contractor shall exercise precaution to insure that
all joints between boards are tight during placement and
backfilling with only extruded ends placed end to end or
edge to edge.
' The first layer of material placed over the insulation
shall be 6 inches in depth, free of rock or stone fragments
measuring 12 inches or greater. The material shall be placed
in such a manner that construction equipment does not
operate directly on the insulation and shall be compacted
with equipment which exerts a contact pressure of less than
80 psi. The first layer shall be compacted until there is no
' further visual evidence of increased consolidation or the
density of the compacted layer conforms to the density
requirements specified in the Special Provisions.
' D Connection and Assembl of Joints
Y
Where rubber gasketed joints are specified, care shall be
taken during the laying and setting of piping materials to
insure that the units being jointed have the same nominal
' dimension of the spigot outside diameter and the socket
inside diameter. R special adaptor shall be provided to make
the connection when variations in nominal dimension might
' cause unsatifactory joint sealing.
Immediately before making the connection, the inside of
the bell or socket and the outer surface of the spigot ends
' shall be thoroughly cleaned to remove oil, grit, excess
coating, and other foreign matter. Insertion of spigot ends
into the socket or bell ends shall be accomplished in a
manner that will assure proper centering and insertion to
full depth. The joint seal and securing requirements shall
be as prescribed below for, the applicable pipe and joint
type.
' - 25 -
D1 Ductile Iron Pipe Joints
Dla Push-On Joints
The circular rubber gasket shall be kept in a warm,
flexible condition at all times, and for purposes of
placement shall be flexed inward and inserted in the gasket
recess of the bell socket. A thin film of approved gasket
lubricant shall be applied to either the inside surface of
the gasket or the outside surface of the spigot end, or to
both. Care shall be taken while inserting the spigot end to
prevent introduction of contaminants. The joint shall be
completed by forcing the spigot end to the bottom of the
socket by the use of suitable pry-bar or jack-type
equipment. Spigot ends which do not have depth marks shall
be marked before assembly to insure full insertion. Field
cut pipe shall be filed or ground at the spigot edge to
resemble the manufacturer's fabricated detailing. The use of
the bucket on the excavation equipment to force the pipe
into the socket shall not be permitted.
Dlb Mechanical Joints
The last eight inches of the outside spigot surface and
the inside bell surface of each pipe and appurtenance joint
shall be painted with a soap solution, after being
thoroughly cleaned. The gland shall then be slipped on the
spigot end with the lip extension toward the socket or bell
end. The rubber gasket shall be kept in a warm, flexible
condition at all times, and for purposes of placement shall
be painted with soap solution and be placed on the spigot
end with the thick edge toward the gland. An approved
lubricant provided by the pipe manufacturer may be used in
lieu of the soap solution.
After the spigot end is inserted into the socket to full
depth and centered, the gasket shall be pressed into place
within the bell evenly around the entire joint. After the
gland is positioned behind the gasket, all bolts shall be
installed and the nuts tightened alternately to the
specified torque, such as to produce equal pressure on all
parts of the gland.
Unless otherwise specified, the bolts shall be tightened
by means of a suitable torque-limiting wrench to within a
foot-pound range of : 45 to 60 for 5/8 inch bolts ; 75 to 90
for 3/4 inch bolts; 85 to 100 for 1 inch bolts; and 105 to
120 for 14 inch bolts. After tightening, all exposed parts
of the bolts and nuts shall be completely coated with an
approved asphaltic type rust preventive material.
- 26 -
i
0
D2 Concrete Pressure Pipe Joints
Unless otherwise indicated, all pipe and appurtenances
shall be joined by means of the rubber gasketed bell and
spigot connection in accordance with the recommendations
of the pipe manufacturer and the provisions hereof. All
contact surfaces of the concrete bell and spigot assembly
shall be thoroughly lubricated with approved material
before the connection is made.
After the joint has been set in the home position, the
outside joint recess shall be filled with cement grout,
poured into place by means of a paper or cloth diaper. The
grout shall contain at least one part Portland cement for
each two parts of sand. Care shall be taken in pouring the
grout to assure complete filling of the recess around the
entire pipe circumference.
D3 Polyvinyl Chloride Pipe Joints
D3a Push-On Joints
The circular rubber gasket shall be bonded to the inner
wall of the gasket recess of the bell socket. Installation
of pipe spigot into the bell socket shall conform to the
requirements for Ductile Iron Push-On Joints, as set forth
under the provisions of 2611.3D1a.
E Water Service Installations
' Water service facilities consisting of Tap Service
Lines and Branch Service Lines, complete with all required
appurtenances, shall be installed as required in the
Plans, Specifications and Special Provisions, in accor-
' dance with all pertinent requirements for main line
installations, together with the provisions hereof.
It shall be the responsibility of the Contractor to
' keep an accurate record of the location, depth and size of
each service connection and other pertinent data, such as
' the location of curb stops and pipe endings. Tap locations
shall be recorded in reference to surve
line
t
ti
i
y
s
a
on
ng.
Curb stops shall be tied to definable land marks such as
building corners, lot corner markers, etc. Pipe terminals
' at the property line shall be marked on the ground surface
with a suitable wood timber 4 by 4 inch, 6 to 8 feet long
,
driven vertically into the ground at least 4 feet, with
the top 2 feet painted blue. Approved record keeping forms
will be furnished by the Engineer and the completed
records shall be submitted by the Contractor upon
' completion of the work.
- 27 -
l
Water service lines shall normally be installed by
trenching and be subject to the same requirements as
prescribed for the main pipeline installation, except for
those which may not be pertinent or applicable. Where
water service lines are installed alongside of sanitary or
storm sewer service lines, installation shall be such as
to maintain the minimum specified clearances between '
pipelines and provide proper and adequate bearing for all
pipes and appurtenances. For separate installation, the
trench width shall be not less than two feet. Subject to
minimum clearances, the water lines may be laid in a
common trench excavated principally for sewer instal-
lation, either by widening the trench as necessary, or by
providing a shelf in the trench wall where ground '
stability will permit. When water service pipe is placed
in a common trench with sewer service pipe, the sewer
service pipe shall be constructed of materials and with ,
joints equivalent to watermain standards.
Unless otherwise specified, installation of water
service lines shall be such as to provide for not less ,
than seven feet of cover over the top of the pipe and for
not less than 18 inches of clearance between pipelines.
Also, at least 3 inches of clearance shall be maintained
in crossing over or under other structures. Where the
service pipe may be exposed to freezing due to insuffi-
cient cover or exposure from other underground structures,
the water pipe shall be insulated as directed by the
Engineer.
EI Branch Service Lines
Branch service piping shall be of the type, size, and e
wall thickness specified. The pipe and appurtenances shall
have rubber gasketed push-on or mechanical joints. Unless
otherwise indicated, hydrant service pipe shall be ductile
iron pipe, 6 inches in diameter. Otherwise, larger than ,
minimum size branch service lines shall be provided as
required by the Plans. '
Installation of branch service facilities shall be in
accordance with all applicable requirements of these
specifications as pertain to the mainline installations. '
E2 Tap Service Lines ,
Tap service piping shall be Seamless Copper Water Tube
of the size and type specified. Unless otherwise speci-
fied, minimum pipe size for tap service installations
shall be one inch nominal inside diameter. Larger size
- 28 - '
pipe will be specified for commercial and industrial tap
service and for some domestic service, as specifically
indentified.
C
0
J
Installation of tap service facilities shall be in
accordance with all applicable requirements of these
specifications as pertain to the mainline installations,
subject to the exceptions and supplementary provisions set
forth hereinafter.
Unless otherwise indicated, tap service piping may be
laid directly on any solid foundation soil that is free of
stones and hard lumps. However, when specified or ordered,
aggregate materials shall be furnished and placed as
necessary to secure proper foundation drainage, pipe
covering, or backfill support.
Tap service piping of 3/4 inch to and including 14
inches in diameter shall be installed in one piece without
intermediate joint couplings between the corporation stop
at the water main tap and the curb stop. Service pipe of
1'-z inches in diameter and larger may be furnished in
standard cut-lengths of 20 feet or longer and may be
joined with approved couplings, provided that the instal-
lation of pipe less than full standard length in any run
shall be limited to the needs for closure. All pipe and
appurtenances shall be joined by means of approved flared
or compression type threaded couplings.
Unless otherwise specified, connection of tap service
lines to the water main shall be made with an approved
corporation stop and saddle, with the water main tap being
made at an angle of not more than 22 degrees from the
horizontal. A double wrap of Teflon tape shall be placed
on the corporation stop threads prior to installation in
the main. Expansion loops shall be directed downward from
the tap. One and one-half and two-inch service pipe shall
have a 45 degree bend connected to the corporation stop to
facilitate the downward expansion loop.
Unless otherwise indicated, tap service lines shall be
installed on a straight line at right angles to the water
main or property line as directed by the Engineer. Service
lines shall extend for such distance beyond the curb stops
as may be specified in the Contract. In the absence of
specific requirements, the service line shall be termin-
ated at the property line, where it shall be connected to
an existing line or, in the case of undeveloped property,
it shall be capped, plugged, or peened as approved by the
Engineer.
- 29 -
The flaring of copper tubing ends shall be acomplished '
only with the use of the proper size and type of tools, as
designed for the purpose, such as will provide accurate
sizing and rounding of the ends. Tubing shall be cut
squarely and all edge roughness shall be removed prior to
flaring. All couplings shall be tightened securely, so the
flared end fits snugly against the bevel of the fitting
without leakage. The flared joint couplings shall be made '
up without the use of jointing compounds.
The service pipe and curb stop coupling depth shall be
such as to maintain not less than the specified minimum
cover, or in locations where conflict may occur with storm
sewer, service pipe shall be placed at least 3 feet below
the storm sewer invert or shall be insulated in accordance
with the Plans, Specifications, and Special Provisions to
prevent freezing. In any case, the Contractor shall make
every effort to provide for a standard service box '
installation where practicable. The service box shall be
centered over the curb stop coupling and be firmly
supported on concrete blocking as required by the Plans,
Specifications, and Special Provisions. Clearance shall be
provided so the service box does not rest on the water
pipe. Service boxes shall be installed plumb and be braced
effectively to remain vertical during and after completion ,
of backfilling. The service boxes shall be brought to
proper surface grade when the final ground surface has
been established.
F Setting Valves, Hydrants, Fittings and Specials
Valves, hydrants, fittings, and specials shall be
provided and installed as required by the Plans, Specifi-
cations, and Special Provisions, with the exact loctions
and setting as directed by the Engineer, and with
installation accomplished in accordance with the require-
ments for installation of mainline pipe to the extent
applicable. Support blocking, reaction backing, and
anchorage devices shall be provided as required by the
Plans, Specifications, and Special Provisions, or as
otherwise ordered by the Engineer.
Hydrants shall be installed plumb, with the height and
orientation of nozzles as shown in the Plans or as
directed by the Engineer. Unless otherwise specified, the
hydrants shall be connected to the mainline pipe with
6-inch diameter ductile iron branch pipe, controlled by an
independent gate valve.
When a hydrant with an open drain outlet is set in clay
or other impervious soil, a drainage pit of at least one
cubic yard shall be excavated below and around the hydrant
base and the pit shall be filled with Foundation Material
- 30 -- 1
1
to a level six inches above the drain outlet. Two layers
of tar paper, or other material approved by the Engineer,
shall be carefully placed over the rock to prevent
backfill material from entering voids in the rock drain.
Hydrants located where the groundwater table is above the
drain outlet shall have the outlet plugged and shall be
equipped with a tag stating, "Pump After Use".
Valve boxes shall be centered over the wrench nut of
the valve and be installed plumb, with the box cover flush
with the surface of the finished pavement or at such other
level as may be directed. Valve boxes shall not be
installed so as to transmit shock or stress to the valve.
Masonry valve pit structures, for valves with exposed
gearing or operating mechanisms, shall be constructed in
accordance with the details shown in the Plans and with
the applicable provisions of MnDOT Specification 2506.
Drainage branches, blow-offs, air vents, and other
special appurtenances shall be provided and installed as
required by the Plans, Specifications, and Special
Provisions.
' All dead ends shall be closed with approved mechanical
joint plugs or caps and shall be equipped with suitable
blow-off facilities.
' G Disinfection of Water Mains
Before being placed in service, the com leted
P water
main installation shall be disinfected and flushed
and
,
after the final flushing the water shall be tested for
bacteriologic quality and found to meet the standards
prescribed by the Minnesota Department of Health. Disin-
' fection materials and procedures, and the collection and
testing of water sam
le
h
ll
p
s, s
a
be in accordance with the
provisions of AWWA C-651 and as will meet the requirements
of the Minnesota Department of Health.
Where an existing water main is cut for the installa-
tion of a hydrant, for lowering the water main, or for
reasons determined by the Engineer, the pipe and fittings
proposed to be installed shall be disinfected prior to
installation as follows:
' (1) The. interior of the pipe and fittings shall be
cleaned of all dirt and foreign material.
(2) The interior of the pipe and fittings shall be
thoroughly swabbed or sprayed with a 1 percent
minimum hYPochlorite solution.
- 31 -
Unless otherwise indicated in the Plans, Specifica- ,
tions, and Special Provisions, the Contractor shall
furnish all materials and perform the disinfecting,
flushing, and testing as necessary for meeting the water '
quality requirements. The flushing operations and the form
of chlorine and method of application to be used shall be
subject to approval by the Engineer. '
H Electrical Conductivity Test
The Contractor shall perform a conductivity test within
one week after completion of pressure testing of the main
on all iron pipe water mains to establish that electrical
thawing may be carried out in the future.
The system (pipeline, valves, fittings and hydrants)
shall be tested for electrical continuity and current
capacity. The electrical test shall be made after the
hydrostatic pressure test and while the line is at normal
operating pressure. Backfilling shall have been completed.
The line may be tested in sections of convenient length as
approved by the Engineer.
Direct current of 350 amperes, + 10%, shall be passed
through the pipeline for 5 minutes. Current flow through
the pipe shall be measured continuously on a suitable
ammeter and shall remain steady without interruption or
excessive fluctuation throughout the 5-minute test period.
Insufficient current or intermittent current or arcing,
indicated by large fluctuation of the ammeter needle,
shall be evidence of defective contact in the pipeline.
The cause shall be isolated and corrected. Thereafter, the
section in which the defective test occurred shall be
retested as a unit and shall meet the requirements.
Sources of Direct Current for these tests may be motor
generators, batteries, arc welding machines, etc. Direct
Current arc welding machines will probably be the usual
source. These machines are available in adequate capacity
for these tests and are equipped with controls for
regulating the current output. All such equipment shall be
furnished by the Contractor, subject to the approval of
the Engineer.
Cables from the power source to the section of system
under test should be of sufficient size to carry the test '
current without overheating or excessive voltage drop.
Usable sizes will probably be in the range of 2/0 to 4/0
A.W.G.
Connections for the test shall be made at hydrants. The
hydrants shall be in the open position with the caps on
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during the test. The cable shall be clamped to the body of
the hydrant.
Note: After the test the hydrant shall be shut off and a
cap loosened to allow hydrant drainage. Tighten
cap after drainage.
A hook-up type Direct Current ammeter placed on one of
the cables leading to the hydrant is a convenient method
of measuring current.
In using arc welding machines, the current control
should be set at minimum before starting. After starting
the machines, advance the control until the current
indicated on the ammeter is at the desired test value.
Caution: In case of open circuits at joints or con-
nections, the voltage across the defective joint or
connection will be in order of 50-100 volts.
I Hydrostatic Testing of Water Mains
Each valved section shall be subjected to the pressure
and leakage tests prescribed herein. The Contractor shall
furnish the pump, pipe connections, gauges, and measuring
equipment, and shall perform the testing under the direct
observation of the Engineer. Where permanent air vents are
not provided, the Contractor shall provide and install
corporation stops at the high points as needed for release
of air as the line is filled with water.
Where concrete reaction blocking is placed, the water
main shall not be subjected to hydrostatic pressure until
at least 5 days have elapsed after the concrete casting,
with the exception that this period may be reduced to 2
days where high early strength concrete is used.
At the option of the Engineer, the pressure and leakage
tests may be conducted simultaneously. Any defective
joints, and any defective pipe, fittings, valves, or
hydrants, revealed during the testing or before final
acceptance of the work shall be satisfactorily corrected
and the tests shall be repeated until the specified
requirements have been met.
I1 Pressure Test
The section being tested shall be slowly filled with
water and the specified test pressure shall be applied,
after all air has been expelled from the pipe. A
hydrostatic pressure of not less than 150 pounds per
square inch, measured at the lowest point of elevation,
- 33 -
shall be applied by means of a pump connected to the pipe
in a satisfactory manner.
The specified pressure shall be held for a minimum ,
duration of two hours. No drop in pressure will be allowed
except as specified in the Special Provisions.
Service Pipe may be tested at the time of the foregoing
test, if installed, at the Contractor's option. However,
testing of service pipes may be completed as a separate
operation from main testing, and if so, the test pressure
shall be 100 p.s.i. Service pipe testing, if done
separately, shall be done with the corporation stop open.
I2 Leakage Test
After satisfactory completion of the pressure test, a
leakage test shall be performed on each valved section of
watermain to determine the quantity of water that must be
supplied into the section to maintain a test pressure of '
150 pounds per square inch, after the air in the pipeline
has been expelled and the pipe has been filled with water.
After filling the pipe with water and expelling all air
in the line, the specified pressure shall be applied in
the same manner as prescribed for the pressure test, and
sufficient water shall be measured and supplied into the
pipe section to maintain the pressure for a test duration
of 2 hours.
Each pipe .section tested will be accepted if the
leakage does not exceed the quantity. determined by the
formula given below.
SD~
L __
133200
L = Maximum permissible leakage in gallons per hour
S = Length of pipe tested in feet
D = Nominal diameter of pipe in inches
P = Average test pressure during the test, in pounds per
square inch, gauge pressure.
If the pipe section under test contains pipe of various
diameters, the allowable leakage will be the sum of the
computed leakage for each size of pipe.
When requested, the Contractor shall furnish a written
report of the results of leakage tests, which shall
identify the specific test section, the average pressure,
the duration of test, and the amount of leakage.
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J Pipeline Backfilling Operations
All pipeline excavations shall be backfilled to restore
pre-existing conditions as the minimum requirement, and
fulfill all supplementary requirements indicated in the
Plans, Specifications, and Special Provisions. The back-
filling operations shall be started as soon as conditions
will permit on each section of pipeline, so as to provide
continuity in subsequent operations and restore normal
public service as soon as practicable on a section-by-
section basis. All operations shall be pursued diligently,
with proper and adequate equipment, as will assure
acceptable results.
The backfilling shall be accomplished with the use of
Suitable Materials selected from the excavated materials
to the extent available and practical. Should the
materials available within the trench section be unsuit-
able or insufficient, without loading and hauling or the
employment of unreasonable measures, the required addi-
tional materials shall be furnished from outside sources
as an Extra Work item in the absence of any Special
Provision requirements.
Suitable Material shall be defined as a mineral soil
reasonably free of foreign materials (rubbish, debris,
etc.), frozen clumps, oversize stone, rock, concrete or
bituminous chunks, and other unsuitable materials, that
may damage the pipe installation, prevent thorough
compaction, or increase the risks of after settlement
unnecessarily. Material selection shall be such as to make
the best and fullest utilization of what is available,
taking into consideration particular needs of different
backfill zones. Material containing stone, rock, or chunks
of any sort shall only be utilized where and to the extent
there will be no detrimental effects.
Within the pipe bedding and encasement zones described
as that portion of the trench which is below an elevation
one foot above the top of the pipe, the materials placed
shall be limited in particle size to 12 inches maximum in
the case of pipe of 12 inches in diameter or less, and to
2 inches maximum in the case of larger pipe. Above these
zones, the placement of material containing stones,
boulders, chunks, etc. greater than 8 inches in any
dimension shall not be allowed.
Compaction of materials placed within the pipe bedding
and encasement zones shall be accomplished with portable
or hand equipment methods, so as to achieve thorough
consolidation under and around the pipe and avoid damage
to the pipe. Above the cover zone material, the use of
heavy roller type compaction equipment shall be limited to
safe pipe loading.
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Backfill materials shall be carefully placed in uniform
loose thickness layers of 8 inches spread over the full
width and length of the trench section to provide
simultaneous support on both sides of the pipeline.
Granular backfill may be placed in 12-inch layers above an '
elevation one foot above the top of the pipe, and with the
provision that, by authority and at the discretion of the
Engineer in consideration of the demonstrated capability '
of special type vibrating compactors, the stated maximums
may be increased.
Each l
f b
kfil
ayer o
ac
l material shall be compacted
effectively, by approved mechanical or hand methods, until
there is no further visual evidence of increased consoli-
dation or the density of the compacted layer conforms to
the density requirements specified in the Special Provi-
sions. Compaction of the inplace layer shall be completed
acceptably before placing material for a succeeding layer '
thereon. The manner of placement, compaction equipment, or
procedure effectiveness shall be subject to approval of
the Engineer. ,
All surplus or waste materials remaining after comple-
tion of the backfilling operations shall be disposed of in
an acceptable manner within 24 hours after completing the '
backfill work on each particular pipeline section.
Disposal at any location within the project limits shall
be as specified, or as approved by the .Engineer;
otherwise, disposal shall be accomplished outside the
project limits at the Contractor's discretion. The
backfilling and surplus or waste disposal operations shall
be a part of the work required under the pipeline '
installation items, not as work that may be delayed until
final cleanup.
Until expiration of the guarantee period, the Contrac-
tor shall assume full responsibility and expense for all
backfill settlement and shall refill and restore the work
as directed to maintain an acceptable surface condition
,
regardless of location. All additional materials required
shall be furnished without additional cost to the Owner.
K Restoration of Surface Improvements e
Wherever any surface improvements such as pavement,
curbing, pedestrian walks, fencing, or turfing have been
removed, damaged or otherwise disturbed by the Contrac- '
tor's operations, they shall be repaired or replaced to
the Engineer's satisfaction, as will restore the improve-
ment in kind and structure to the preexisting condition. ,
Each item of restoration work shall be done as soon as
practicable after completion of installation and backfil-
ling operations on each section of pipeline.
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In the absence of specific payment provisions, as
separate Contract Items, the restoration work shall be
compensated for as part of the work required under those
Contract Items which necessitated the destruction and
replacement or repair, and there will be no separate
payment therefor. If separate pay items are provided for
restoration work, only that portion of the repair or
reconstruction which was necessitated by the Contract work
will be measured for payment. Any improvements removed or
damaged unnecessarily or undermined shall be replaced or
repaired at the Contractor's expense.
K1 Turf Restoration
Turf restoration shall be accomplished by sod placement
except where seeding is specifically allowed or required.
Topsoil shall be placed to a minimum depth of four
inches under all sodding and in all areas seeded. The
topsoil material used shall be light friable loam
containing a liberal amount of humus, and shall be free of
heavy clay, coarse sand, stones, plants, roots, sticks and
other foreign matter. Topsoil meeting these requirements
shall be selected from the excavated materials to the
extent available and needed.
All. turf establishment work shall be done in substan-
tial compliance with the provisions of MnDOT Specification
2575. Seed shall be Mixture No. 5 of MnDOT Specification
3876, unless otherwise directed or approved.
' K2 Pavement Restoration
The inplace pavement structure (including base aggre-
gates) shall be restored in kind and depth as previously
existed, using base aggregates salvaged from the excavated
materials to the extent available and needed, and with new
' materials being provided for reconstruction of the
concrete or bituminous surface courses.
' If, through no fault of the Contractor in failing to
reserve sufficient aggregate materials from the excava-
tions, there should be insufficient quantity of suitable
aggregate to reconstruct the pavement base courses, the
' additional materials required will be furnished by the
Owner at its expense, or the Contractor will be ordered to
furnish the additional materials from outside sources as
' an Extra Work Item in the absence of an appropriate
Contract Item therefor. Placement of any additional
aggregate materials delivered to the site by the Owner or
- 37 -
of any additional materials furnished by the Contractor
shall be an incidental expense, as will also be the
disposal of any excess materials resulting therefrom,
unless special payment provisions are otherwise agreed
upon.
Reconstruction of aggregate base courses and concrete
or bituminous surface courses shall be in substantial
compliance with all applicable MnDOT Specifications
pertaining to the item being restored. The materials used
shall be comparable to those used in the inplace
structure, and the workmanship and finished quality shall
be equal to that of new construction to the fullest extent
obtainable in consideration of operational restrictions.
Existing concrete and bituminous surfaces at the trench
wall shall be sawed or cut with a cutting wheel to form a
neat edge in a straight line before surfaces are to be
restored. Sawing or cutting may be accomplished as a part
of the removal or prior to restoration at the option of
the Contractor. However, all surface edges will be
inspected prior to restoration.
K3 Restoration of Miscellaneous Items
Wherever any curbing, curb and gutter sections,
pedestrian walks, fencing, driveway surfacing, or other
improvements are removed or in any way damaged or
undermined, they shall be restored to original condition
by repair or replacement as the Engineer considers
necessary. Replacement of old materials will be acceptable
only to the extent that existing quality can be fully
achieved, such as in the case of fencing. Otherwise new
materials shall be provided and placed as the Engineer
directs. Workmanship and finished quality shall be equal
to that of new construction, where new materials are used,
to the extent obtainable in consideration of operational
restrictions.
A proper foundation shall be prepared before recon-
structing concrete or bituminous improvements. Unless
otherwise directed, granular material shall be placed to a
depth of at least four inches under all concrete and
bituminous items. No direct compensation will be made for
furnishing and placing- this material even though such
course was not part of the original construction.
L Maintenance and Final Cleanup
All subgrade surfaces shall be maintained acceptably
until the start of surfacing construction or restoration
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work, and until the work has been finally .accepted.
Additional materials shall be provided and placed as
needed to compensate for trench settlement and to serve as
temporary construction pending completion of the final
surface improvements.
Final disposal of debris, waste materials, and other
remains or consequences of construction, shall be accom-
plished intermittently as new construction items are
completed and shall not be left to await final completion
of all work. Cleanup operation shall be considered as
being a part of the work covered under the Contract Items
involved and only that work which cannot be accomplished
at any early time shall be considered as final cleanup
work not attributable to a specific Contract Item.
If disposal operations and other cleanup work are not
conducted properly as the construction progresses, the
Engineer may withhold partial payments until such work is
satisfactorily pursued or he may deduct the estimated cost
of its performance from the partial estimate value.
Maintenance of sodded and seeded areas shall include
adequate watering for plant growth and the replacement of
any dead or damaged sod as may be required for acceptance
of the work.
' M Operational Inspection
At the completion of the project and in the presence of
' the Engineer and the Contractor, representatives of the
Owner shall operate all valves, hydrants, and water
services to ascertain that the entire facility is in good
working order; that all valve boxes are centered and
' valves are opened; that all hydrants operate and drain
properly; that all curb boxes are plumb and centered; and
that water is available at all curb stops.
2611.4 METHOD OF MEASUREMENT
' All items will be measured separately according to design
designation as indicated in the Pay Item name and as may be
detailed and defined in the Plans, Specifications, or Special
' Provisions. Pipe will generally be designated by size (inside
diameter or span), strength class, kind or type, and laying
condition. Complete-in-Place items shall include all component
' parts thereof as described or required to complete the unit,
but excluding any excesses covered by separate Pay Items.
Lineal measurement of piping will include the running length of
any special fittings (tees, wyes, bends, gates, ,etc.) installed
' within the line of measure between specified terminal points.
- 39 -
A Water Pipe
Mainline pipe, branch service pipe, and tap service
pipe of each kind and size will be measured separately by
the overall length along the axis of the pipeline
from
,
beginning to end of each installation and without regard '
to intervening valves or specials. Terminal points of
measure will be the spigot or cut end, base of hub or bell
end, center of valves or hydrants, intersecting centers of '
tee or wye branch service connections, and center of
corporation stop or curb stop couplings.
B Valves
Valves of each size and type will be measured '
separately as complete units, including the required
manhole or valve box setting.
C Corporation Stops
Corporation stops of each size and type will be '
measured separately by the number of units installed,
including the required curb box.
D Curb Stops
Curb stops of each size and type will be measured
separately by the number of units installed, including the
required curb box.
E Hydrants
Hydrants will be measured by the number of complete
units installed.
F Air Vents ,
Air vents of each type and size will be measured
separately by the number of complete units installed,
including the required manhole or valve box setting. ,
G Rearrangement of Inplace Facilities ,
The removal, relocation, extension, or adjustment of
inplace facilities such as hydrants, valves, curb stops, ,
pipe, etc., will be measured, as indicated in the
Proposal, by the number of complete units of each item on
a lump sum basis or by the number of linear feet of each
item such as pipe. '
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H Polyethylene Encasement
Polyethylene encasement of pipe will be measured by the
linear foot of pipe encased of each specified size.
I Ductile and Gray Iron Fittings
Ductile and Gray iron fittings shall be measured by the
pound without joint accessories and shall be the standard
weight of fittings as published in AWWA C-110. If the
Contractor chooses to use compact ductile iron fittings in
accordance with AWWA C-153, measurement compensation for
material price and weight differences shall be in
accordance with AWWA C-110.
J Access Structures
Access structures, such as valve boxes, service boxes,
manholes and vaults, will be measured for payment only
when and to the extent that the Proposal contains specific
items therefor. Otherwise, the required structures are
included for payment as part of the pipe appurtenance
(Gate Valve, Curb Stop, Air Vent, etc.) item which is
served. When applicable, measurement will be by the number
of individual units installed of each type and design.
K Granular Materials
Granular materials furnished and placed as special
foundation, bedding, encasement, or backfill construction
will be measured by weight or volume of material furnished
by the Contractor from outside sources and placed within
the limits defined. Unless otherwise specified, volume
will be determined by vehicular measure (loose volume) at
the point of delivery. Measurements will not include any
materials required to be placed as a component part of
other Contract Items as may be specified.
L Piling
Piling shall be measured according to the provisions of
MnDOT Specification 2452.
' Ll Pile Bents
Pile bents shall be measured as a unit and shall
include all materials and labor required, except the pile.
' M Insulation
' Rigid board insulation shall be measured on a square
foot basis installed to the specified thickness noted on
the Plans, Specifications, and Special Provisions and
i~
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shall include all materials, equipment, and labor .required
for placement.
2611.5 BASIS OF PAYN~NT ,
Payment for construction of water distribution facilities
will be made only under the items of Water Main, Branch '
Service, and Tap Service Pipe; the items of Gate Valves,
Corporation Stops, Curb Stops, Hydrants, Air Vents, Polyethy-
lene Encasement, Insulation, and Specials as identified by e
Contract Item; and the items of Relocate, Extend, Adjust or
Remove existing facilities as identified by Contract Item; with
all other costs of constructing the complete facility as '
required by the Plans, Specifications, and Special Provisions
being incidental thereto to the extent that the work does not
qualify as an Extra Work Item. '
Payment for Water Main Pipe, Branch Service Pipe, and Tap
Service Pipe, of each size and kind at the appropriate Contract
prices per linear foot of installation, shall be compensation
in full for all costs of furnishing and installing the pipe
complete in place as specified, including all costs of pipe
installation and surface restoration as may not be specifically
covered under other Contract Items. All costs of pipeline ,
disinfection, leakage testing, pipe jointing materials, dead
end plugs and caps, making connections to existing facilities,
blocking and anchorage materials, and other work necessary for '
proper installation of pipe as specified, shall be included for
.payment as part of the pipe item, without any direct
compensation being made therefor. ,
Payment for Valves, Corporation Stops, Curb Stops,
Hydrants, Air Vents, Polyethylene Encasement, Insulation, and
other specially identified appurtenant items, at the appro- '
priate Contract prices per unit of measure for each size and
type or kind, shall be compensation in full for all costs of
furnishing and installing the necessary materials complete in ,
place as specified, including all costs of furnishing and
installing or constructing the required access structures for
valves, vents, and specials, which are not to be paid for '
separately. Access structures such as Valve Boxes, Service
Boxes, Manholes, and Vaults will be paid for as separate items
only when and to the extent that the Proposal contains separate
items therefor. '
Payment for rearrangement of inplace facilities under
specially named items indicating Relocation, Extension, Adjust-
ment, or Removal, at the appropriate Contract prices per unit
of measure, shall be compensation in full for all costs of
performing the work as specified. '
.All costs of excavating to foundation grade, preparing the
foundation, placing and compacting backfill materials, restor-
ing surface improvements, and other work necessary for 1
- 42 -
prosecution and completion of the work as specified, shall be
.included for payment as part of the pipe and pipe appurtenance
items without any direct compensation being made therefor.
When special aggregate backfill materials are required to
be furnished and placed to comply with the indicated Laying
Conditions, the costs thereof shall be included for payment as
part of the pipe items without any direct compensation
therefor. Otherwise, the furnishing of aggregate materials for
.backfill by order of the Engineer in the absence of such
requirements will be compensated for as an Extra Work Item.
In the absence of special payment provisions, all costs of
repairing, replacing, or otherwise restoring surface improve-
ments as required by the Contract, shall be included for
payment as part of other Contract items without any direct
.compensation being made therefor.
- 43 -
2621.1 DESCRIPTION
This work shall consist of the construction of pipe sewers
utilizing plant fabricated pipe and other appurtenant materials,
installed for conveyance of sewage, industrial wastes,. or storm
water. The work includes construction of manhole and catch basin
structures and other related items as specified.
Use of the term "Plans,, Specifications, and Special
Provisions" within this specification shall be construed to mean
those documents which compliment, modify, or clarify these
.specifications and are accepted as an enforceable component of
the Contract or Contract Documents. All references to MnDOT
Specifications shall mean the latest published edition of the
Minnesota Department of Transportation Standard Specifications
for Construction, as modified by any MnDOT Supplemental
Specifications issued before the date of advertisement for bids.
All references to other Specifications of AASHTO, ASTM, ANSI,
AWWA, etc. shall mean the latest published edition available on
the date of advertisement for bids.
2621.2 MATERIALS
All materials required for this work shall be new material
conforming to requirements of the referenced specifications for
the class, kind, type, size, grade, and other details indicated
in the Contract. Unless otherwise indicated, all required
materials shall be furnished by the Contractor. If any options
are provided for, as to type, grade, or design of the material,
the choice shall be limited as may be stipulated in the Plans,
Specifications, or Special Provisions.
All manufactured products shall conform in detail to such
standard design drawings as may be referenced or furnished in
' the Plans. Otherwise, the Owner may require advance approval of
material suppliers
product design
or other uns
ecified d
t
il
,
,
p
e
a
s
as it deems desirable for maintaining adopted standards.
' At the request of the Engineer, the Contractor shall submit
in writing a list of materials and suppliers for approval.
Suppliers shall submit a Certificate of Compliance that the
materials furnished have been tested and are in compliance with
the specifications.
A Sewer Pipe and Service Line Materials
All pipe furnished for main sewer and sewer line
installations shall be of the type, kind, size and class
indicated for each particular line segment as shown in the
Plans and designated in the Contract Items. Wherever
' - 44 -
connection of dissimilar materials or designs is required,
the method of joining and any special fittings employed
shall be subject to approval by the Engineer.
Al Vitrified Clay Pipe and Fittings
Vitrified clay extra strength pipe and fittings shall
conform to the requirements of ASTM C-700 for the size and
type and class specified, subject to the following
supplementary provisions:
(1) Unless otherwise specified, the pipe and fittings
shall be non-perforated, full circular type, either
glazed or unglazed.
(2) All pipe and fittings manufactured with bell-and-
spigot ends shall be furnished with factory fabricated
compression joints conforming to the requirements of
ASTM C-425.
(3) In lieu of the bell-and-spigot jointing requirements,
the pipe and fittings may be furnished with plain
ends, in which case the jointing shall be by means of
compression couplings conforming to the requirements
of ASTM C-425, Type B.
(4) All clay pipe fittings (wyes, tees, bends, plugs,
etc.) shall be of the same pipe class and joint design
as the pipe to which they are to be attached.
(5) Pipe and fittings manufactured to the standards of
AASHTO M-65 may be accepted by prior approval of the
Engineer.
A2 Plastic Truss Pipe and Fittings
Plastic truss pipe and fittings shall conform to the
requirements of ASTM D-2680, Acrylonitrile-Butadiene-
Styrene (ABS) Composite Pipe, and Polyvinyl Chloride (PVC)
pipe, 8 inch through 15 inch diameter and joint type
specified, subject to the following supplementary pro-
visions:
(1) Unless otherwise specified, all pipe joints and
fittings connections shall be gasket seal joints,
assembled as recommended by the pipe manufacturer.
Solvent cemented joints, assembled as recommended by
the pipe manufacturer, shall be provided only where
specifically indicated in the Plans, Specifications,
and Special Provisions.
- 45 -
(2) All factory cut pipe ends shall be sealed at the plant
or in the field with suspended ABS joint cement.
(3) The spigot end of each pipe section shall be provided
with suitable marking or gasket stop to indicate full
closure of the assembled joints.
(4) Unless otherwise specified, the pipe shall be fur-
nished with coupling factory-attached to one end of
each pipe section. Tee and wye fittings may be
furnished separately for field installation.
A3 Ductile Iron and Gray Iron Pipe and Fittings
The pipe and fittings furnished shall be of the Ductile
Iron or Gray Iron type as specified for each particular use
or installation. When Gray Iron is specified, either type
may be furnished. Gray Iron may not be substituted for
Ductile Iron unless specifically authorized in the Plans,
Specifications, and .Special Provisions.
Ductile iron pipe shall conform to the requirements of
ANSI A-21.51 (Ductile Iron Pipe Centrifugally Cast in Metal
Molds or Sand-Lined Molds). Gray iron pipe shall .conform
to the requirements of ANSI A-21.6 (Cast Iron Pipe
Centrifugally Cast in Metal Molds) or to the requirements
of ANSI A-21.8 (Cast Iron Pipe Centrifugally Cast in
Sand-Lined Molds). In addition, the pipe shall comply with
the following supplementary provisions:
(1) Fittings shall conform to the requirements of ANSI
A-21.10 (Gray Iron and Ductile Iron Fittings) or ANSI
A-21.53 (Ductile Iron Compact Fittings) for the joint
type specified.
(2) 'Unless otherwise specified, all pipe and fittings
;shall be furnished with cement mortar lining meeting
'the requirements of ANSI A-21.4 for standard thickness
:Lining. All exterior surfaces of the pipe and fittings
;shall have an asphaltic coating at least one mil
thick. Spotty or thin seal coating, or poor coating
adhesion, shall be cause for rejection.
A4 Reinforced Concrete Pipe and Fittings
Reinforced concrete pipe, fittings and specials shall
confo~^m with the requirements of MnDOT Specification 3236
(Reinforced Concrete Pipe) for the type, size, and strength
class specified, subject to the following supplementary
provi:~ions
- 46 -
(1) All branch fittings such as tees, wyes, etc. shall be
cast as integral parts of the pipe. All fittings and
specials shall be of the same strength class as the
pipe to which they are attached.
(2) When flexible watertight joints are specified, joints
shall meet the requirements of ASTM C-361. '
(3) Lift holes will not be permitted unless specifically
authorized in the Plans., Specifications, and Special
Provisions.
A5 Corrugated Steel Pipe and Fittings ,
Corrugated steel pipe and fittings shall conform to the
requirements of MnDOT Specification 3226 (Corrugated Steel
Pipe) for the type, size and sheet thickness specified,
subject to the following supplementary provision:
(1) When specifically provided for in the Plans, Specifi-
cations, and Special Provisions, the galvanized steel
pipe and fittings shall be furnished with special
aramid fiber bonded, bituminous, or plastic coating or
concrete lining as required.
A6 Polyvinyl Chloride Pipe and Fittings
Smooth walled polyvinyl chloride pipe and fittings shall
conform with the requirements of ASTM D-3034 for the size,
standard dimension ratio (SDR), and strength requirements
indicated on the Plans, Specifications, and Special
Provisions. The grade used shall be resistant to aggressive
soils or corrosive substances in accordance with the
requirements of ASTM D-543.
(1) Unless otherwise specified, all pipe and fittings
shall be SDR 35 and connections shall be push-on with '
elastomeric gasketed joints which are bonded to the
inner wall of the gasket recess of the bell socket.
'
Corrugated polyvinyl chloride pipe and fittin s with
smooth interior shall conform with the requirements of ASTM
F-949 for the size and wall thickness indicated on the '
Plans, Specifications, and Special Provisions..
(1) Unless otherwise specified, all pipe and fittings
shall be push-on with snug fit elastomeric joints
meeting tightness requirements of ASTM 3212.
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A7 Cast Iron Soil Pipe
' Unless otherwise specified in the Plans, Specifications,
and Special Provisions., cast iron pipe shall be service
weight pipe meeting the requirements of ASTM A-74 and the
Plan:~, ,Specifications, and Special Provisions. Unless
otherwise specified, pipe joints shall be push-on, sealed
with elastomeric gaskets.
A8 Acrylonitrile-Butadiene-Styrene Pipe
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Ac:rylonitrile-Butadiene-Styrene (ABS) .solid wall pipe
and fittings shall conform to the requirements of ASTM
D-27°il for 4 inch and 6 inch diameter and joint type
specified, subject to the following supplementary provi-
sions:
(1) Unless otherwise specified, all pipe joints and
fitting connections shall be gasket seal joints,
assembled as recommended by the pipe manufacturer.
Solvent cemented joints, assembled as recommended by
the pipe manufacturer, shall be provided only where
specifically indicated in the Plans, Specifications,
and Special Provisions.
B N[etal Sewer Castings
Metal castings for sewer structures such as manhole
framers and covers, catch basin frames, grates and curb
boxes., shall conform to the requirements of ASTM A-48 (Gray
Iron Castings), subject to the following supplementary
provisions:
(1) Casting assemblies or dimensions, details, weights,
and class shall be as indicated in the detailed
drawings for the design designation specified. Unless
otherwise specified, the castings shall be Class 30 or
better.
(2) Lid-to-frame surfaces on round casting assemblies
shall be machine milled to provide true bearing around
the entire circumference.
(3) Casting weight shall be not less than 95 percent of
theoretical weight for a unit cast to exact dimen-
sions, based on 442 pounds per cubic foot.
(4) A Certificate of Compliance shall be furnished with
each shipment of castings stating that the materials
furnished have been tested and are in compliance with
the specification requirements.
- 48 -
(5) Unless otherwise specified, sanitary sewer manholes in ,
areas subject to flooding by surface water shall have
self-sealing lids and recessed pick holes. ,
(6) Unless otherwise specified, sanitary sewer manhole
lids shall have recessed pick holes.
C Precast Concrete Manhole and Catch Basin Sections
Precast concrete riser sections and appurtenant units
(grade rings, top and base slabs, special sections, etc.)
used in the construction of manhole and catch basin
structures, shall conform with the requirements of ASTM ,
C-478, subject to the following supplementary provisions:
(1) The precast sections and appurtenant units shall
conform to all requirements as shown on the detailed i
drawings.
(2) Joints of manhole riser sections shall be tongue and
groove with. rubber "O" ring joints provided on
sanitary sewer manholes. Sanitary sewer inlet and
outlet pipes shall be joined to the manhole with a
gasketed, flexible, watertight connection or any
watertight connection arrangement that allows differ-
ential settlement of the pipe and manhole wall to take ^
place. ^
(3) Air-entrained concrete shall be used in the production
of all units. Air content shall be maintained within
the range of 5 to 7 percent.
(4) A Certificate of Compliance shall be furnished with
each shipment of precast manhole and catch basin
sections stating that the materials .furnished have
been tested and are in compliance with the specifica-
tion requirements.
(5) Lift holes will not be permitted in .precast manholes.
D Concrete
Concrete for cast-in-place masonry construction shall be
produced and furnished in accordance with the requirements
of MnDOT Specification 2461 for the mix designation
indicated in the Plans. The requirements for Grade B
concrete shall be met where a higher grade is not
specified. Type 3 (air-entrained) concrete shall be
furnished and used in all structures having weather
.exposure.
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E Mortar
:Mortar for use in masonry construction shall be an
air-entrained mixture of one part Portland cement and three
parts mortar sand, with sufficient water to produce proper
consistency, and with sufficient air-entrained agent added
to maintain an air content within the range of 7 to 10
percent. Mortar shall meet. the requirements of ASTM C-270.
F Granular Materials
~uranular materials furnished for foundation, bedding,
encasement, backfill, or other purposes as may be specified
shall consist of any natural or synthetic mineral aggregate
such as sand, gravel, crushed rock, crushed stone, or slag,
that shall be so graded as to meet the gradation
requirements specified herein for each particular use.
F1 Granular Material Gradation Classifications
Granular materials furnished for use in Foundation,
Bedding, Encasement, or Backfill construction shall conform
to the following requirements:
Percent Passing
Sieve Size
3 Inch
2 Inch
1 Inch
3/4 Inch
3/8 Inch
No. 4
No. 10
No. 40
No. 20 0
Material Use Designation
Foundation Bedding Encasement Backfill
100
100 100 100
85-100 90-100 90-100
30- 60 50- 90 50- 90
0- 10 35- 80 35- 80 35-100
20- 65 20- 65 20-100
0- 35 0- 35 0- 35
0- 10 0- 10 O- 10
NOTE: Granular foundation, bedding and encasement material provi-
ded for plastic pipe and fittings shall meet the require-
ments of ASTM 2321, Class I, II or III materials or the
requirements provided above if the Engineer authorized such
substitution.
F2 Granular Material Use Designations
Granular materials provided for Foundation, Bedding,
Encasement, or Backfill use as required by the Plans,
Specifications and Special Provisions, either as part of
the pipe item work unit or as a separate Contract Item,
shall be classified as to use in accordance with the
following:
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Material Use Designation Zone Designation '
Granular Foundation -------- Placed below the bottom of pipe
grade as replacement for unsuit-
able or unstable soils, to achieve
better foundation support.
Granular Bedding ----------- Placed below the pipe midpoint, ,
prior to pipe installation, to
facilitate proper shaping and to
achieve uniform pipe support.
Granular Encasement -------- Placed below an elevation one foot
above the top of pipe, after pipe
installation, for protection of '
the pipe and to assure proper
filling of voids or thorough
consolidation of backfill.
Granular Backfill ---------- Placed below the surface base '
course, cif any, as the second
stage of backfill, to minimize
trench settlement and provide
support for surface improvements.
In each case above, unless otherwise indicated, the ,
lower limits of any particular zone shall be the top
surface of the next lower course as constructed. The upper
limits of each zone are established to define variable
needs for material gradation and compaction or void
content, taking into consideration the sequence of con-
struction and other conditions. The material use and zone '
designations described above shall only serve to fulfill
the objectives and shall not be construed to restrict the
use of any particular material in other zones where the
gradation requirements are met.
G Piling '
Piling shall be constructed in accordance with provi-
sions of MnDOT Specification 2452.
H Insulation
Main insulation shall be extruded rigid board material
having a thermal conductivity of 0.23 BTU/hour/square
foot/degree Fahrenheit/per inch thickness, maximum, at 40°F
mean, a compressive strength of 35 psi minimum, and water '
absorption of 0.25 percent by volume maximum.
Unless otherwise specified in the Plans, Specifications, '
and Special Provisions, board dimensions shall measure 8'
long, 2' or 4' wide, and 1" or 1'-z" thick.
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2621.3 CONSTRUCTION REQUIREMENTS
A General Provisions
Al Maintenance of Traffic
Whenever work interferes with the flow of traffic along
a roadway, the Contractor shall provide for traffic control
and signing and public safety in accordance with the
provisions of Appendix B of the Minnesota Manual of Uniform
Traffic Control devices and MnDOT Specifications 1404 and
1710, and the Special Provisions. Neither road closures nor
detours shall be permitted unless specified in the Special
Provisions or authorized by the Engineer. Where road
closures or detours are permitted by the Engineer, the
Engineer shall determine the appropriate agencies, boards,
or departments the Contractor must notify prior to taking
the action and the proper advance notice to be provided to
each body.
Compliance with this requirement shall not be construed
to relieve the Contractor from the responsibility of
notifying agencies or institutions whose services may be
predicated upon a roadway being opened to traffic, or whose
services would be hindered if a roadway is closed to
traffic. Such agencies or institutions shall include, but
not be limited to, the police department, the fire
department, municipal bus service, school bus service, and
ambulance service. The Contractor shall keep the required
agencies informed of changing traffic patterns and detour
situations.
A2 Establishing Line and Grade
In locations where the sewer is in direct conflict with
existing watermain and water services, the watermain and
water services shall be lowered to provide at least 18
inches of vertical distance between the top of the
watermain or service and the bottom of the sanitary sewer
or relocated in accordance with Plans.
When local conditions prevent a vertical separation as
described, the following construction shall be used:
a vertical separation of at least 18 inches between
the bottom of the sewer and the top of the watermain;
adequate structural support for the sewers to prevent
excessive deflection of joints and settling on and
breaking of the watermains;
that the length of water pipe be centered at the point
of crossing so that the joints will be equidistant and
as far as possible from the sewer.
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Watermains shall be laid at least 10 feet horizontall
from any sanitary sewer
whenever possible. When 1
tal separation of 10 fee
to a storm or sanitary se
(1) The bottom of the
above the top of the
Y
storm sewer or sewer manhole,
Kcal conditions prevent a horizon-
t, a watermain may be laid closer
aer provided that:
watermain is at least 18 inches
sewer;
(2) Where this vertical separation cannot be obtained, the
sewer shall be constructed of materials and with
joints that are equivalent to watermain standards of
construction and shall be pressure tested to assure
water tightness prior to backfilling.
The primary line and grade will be established by the
Engineer. For trench installation, line and grade stakes
will be set parallel to the proposed pipeline at an
appropriate offset therefrom as will best serve the
Contractor's operations wherever practical. For tunnel
installation, line and grade stakes will be set directly
above the proposed pipeline setting. Grade and line stakes
will be set at 25-foot intervals along the pipeline; at
each change in line or grade, and as needed for pipeline
appurtenances.
The Contractor shall arrange operations to avoid
unnecessary interference with the establishment of the
primary line and grade stakes, and shall render whatever
assistance may be required by the Engineer in accomplishing
the staking. The Contractor shall be responsible for
preservation of the primary stakes, and, if negligent in
providing necessary protection, shall bear the full cost of
any restaking.
The Contractor shall be solely responsible for the
correct transfer of the primary line and grade to all
working points and for construction of the work to the
prescribed lines and grades as established by the Engineer.
Following construction of a work shaft on tunnel installa-
tions, the line and grade shall be transferred down the
shaft and be projected into and throughout the length of
each tunnel heading.
A3 Protection of Surface Structures
All surface structures and features located outside the
permissible. excavation limits for underground installa-
tions, together with those within the construction areas
which are indicated in the Plans as being saved, shall be
properly protected against damage and shall not be
disturbed or removed without approval of the Engineer.
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Within the construction limits, as required, the removal of
' improvements such as paving, curbing, walks, turf, etc.,
shall be subject to acceptable replacement after completion
of underground work, with all expense of removal and
replacement being borne by the Contractor to the extent
' that separate compensation is not specifically provided for
in the Contract.
' Obstructions such as street signs, guard posts, small
culverts, and other items of prefabricated construction may
be temporarily removed during construction, provided that
essential service is maintained in a relocated setting as
' approved by the Engineer and that nonessential items are
properly stored for the duration of construction. Upon
completion of the underground work, all such items shall be
' replaced in their proper setting at the sole expense of the
Contractor.
In the event of damage to any surface improvements,
either privately or publicly owned, in the absence of
construction necessity, the Contractor will be required to
replace or repair the damaged property to the satisfaction
' of the Engineer and without cost to the Owner.
' A4 Interference of Underground Structures
When any underground structure interferes with the
planned placement of the pipeline or appurtenances to such
' an extent that alterations in the work are necessary to
eliminate the conflict or avoid endangering effects on
either the existing or proposed facilities, the Contractor
shall immediately notify the Engineer and the Owner of the
affected structure. When any existing facilities are
endangered by the Contractor's operations, the Contractor
shall cease work at the site and take such precautions as
' may be necessary to protect the inplace structures until a
decision is made as to how the conflict will be resolved.
' Without specific authorization from the Engineer, no
essential utility service shall be disrupted, nor shall any
change be made in either the existing structures or the
' planned installations to overcome the interference. Altera-
tions in existing facilities will be allowed only to the
extent that service will not be curtailed unavoidably and
then only when the encroachment or relocation will satisfy
' all applicable regulations and conditions.
Wherever alterations are required as a result of
unforeseen underground interferences not due to any fault
or negligence of the Contractor, the Engineer will issue a
written order covering any additional or extra work
' involved and specifying the revised basis of payment, if
' - 54 -
any. Any alterations made strictly for the convenience of
the Contractor shall be subject to prior approval and shall
be at the Contractor's expense.
No extra compensation will be allowed for delays caused
by the interference of underground structures.
A5 Removal of Surface Improvements
Removal of surface improvements in connection with
trench excavation shall be limited to actual needs for
installation of the pipeline and appurtenances, based on
the allowable trench widths and any other controls imposed
in connection with the work. Removal operations shall be
coordinated effectively with the excavation and installa-
tion operations as will cause the least practical disrup-
tion of traffic or inconvenience to the public. The debris
resulting from removals shall become the property of the
Contractor and shall be disposed of by the Contractor.
Removed debris shall not be deposited at locations that
will block access to fire hydrants, private driveways, or
other essential service areas, nor obstruct surface
drainage. Removal and final disposal of debris shall be
accomplished as a single operation wherever possible and,
in any event, the debris shall be removed from the site
before starting the excavating operations.
Removal of concrete or bituminous structures shall be by
methods of producing clean-cut breakage to prescored lines
as will preserve the remaining structure without damage.
Removal equipment shall not be operated in a manner that
will cause damage to the remaining structure or adjoining
property. Where not removed to an existing joint, concrete
structures shall be sawed along the break lines to a
minimum depth of one-third of the structure depth.
Any reusable materials generated during the work, such
as aggregate, sod, or topsoil, shall be segregated from
other waste materials and be stockpiled so as to maintain
suitability and permit proper reuse.
The use of drop weight equipment for breaking pavement
will be allowed to the extent that the Contractor shall
assume full responsibility for any damages caused thereby,
The pavement breaking operations shall not be allowed to
become a nuisance to the public or a source of damage to
underground or adjacent structures. The Engineer reserves
the right to order discontinuance of drop weight breaking
operations at any time.
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A6 Temporary Service Measures
While any open excavations are maintained, the Contrac-
tor shall have available a supply of steel plates suitable
for temporary bridging of open trench sections where either
vehicular or pedestrian traffic must be maintained. Use of
the plates shall be as directed or approved by the Engineer
and where installed they shall be secured against possible
displacement and be replaced with the permanent structure
as soon as possible.
B1 Operational Limitations and Requirements
B Excavation and Preparation of Trench
Excavating operations shall proceed only so far in
advance of pipe laying as will satisfy the needs for
coordination of work and permit advance verification of
unobstructed line and grade as planned. Where interference
with existing structures is possible or in any way
indicated, and where necessary to establish elevation or
direction for connections to inplace structures, the
excavating shall be done at those locations in advance of
the main operation so actual conditions will be exposed in
sufficient time to make adjustments without resorting to
extra work or unnecessary delay.
All installations shall be accomplished by open trench
construction except for short tunnel sections approved by
the Engineer and with the exception that boring and jacking
or tunnel construction methods shall be employed where so
specifically required by the Plans, Specifications, or
Special Provisions. Installation of pipe through tunnel
excavations will be allowed only where the surface
structure can be properly supported and the backfill
.restored to the satisfaction of the Engineer.
The excavating operations shall be conducted so as to
carefully expose all inplace underground structures without
damage. Wherever the excavation extends under or approaches
so close to an existing structure as to endanger it in any
way, precautions and protective measures shall be taken as
necessary to preserve the structure and provide temporary
support. Hand methods of excavating shall be utilized to
probe for and expose such critical or hazardous installa-
tions as gas pipe and power or communication cables.
The Engineer shall be notified of any need for blasting
to remove materials which cannot be broken up mechanically,
and there shall be no blasting operations conducted until
the Engineer's approval has been secured. Blasting will be
allowed only when proper precautions are taken to protect
- 56 -
life and property, and then shall be restricted as the '
Engineer directs. The Contractor shall assume full respon-
sibility for any damages caused by blasting, regardless of ,
the requirements for notification and approval. The
Contractor shall secure any required permits for blasting
and shall conduct blasting operations in conformance with
all applicable state and local laws, regulations and
ordinances.
B2 Classification and Disposition of Materials
Excavated materials will be classified for payment only
to the extent that the removal of materials classified by '
the Engineer as Rock will be paid for separately from other
unclassified materials., either as a separate Contract Item
or as an Extra Work Item when no bid price is applicable.
No other materials encountered in the excavations, with the '
exception of items classified for payment as structure
removals, will be considered as Unclassified Excavation,
and unless otherwise specified in the Plans, Specifi-
cations, and Special Provisions, no additional compensation
shall be provided for their removal. Unclassified materials
shall include muck, rubble, wood debris, and boulder stone, '
masonry or concrete fragments less than one cubic yard in
volume, together with other miscellaneous matter that can
be removed effectively with power operated excavators
without resorting to drilling and blasting.
Rock excavation shall be defined to include all hard,
solid rock in ledge .formation, bedded deposits and
unstratified masses; all natural conglomerate deposits so
firmly cemented as to present all the characteristics of
solid rock; and any boulder stone, masonry or concrete ,
fragments exceeding one cubic yard in volume. Materials
such as shale, hard pan, soft or disintegrated rock which
can be dislodged with a hand pick or removed with a power '
operated excavator will not be classified as Rock Excava-
tion.
Excavated materials will be classified for reuse as '
being either Suitable or Unsuitable for backfill or other
specified use, subject to selective controls. All suitable
materials shall be reserved for backfill to the extent
needed, and any surplus remaining shall be utilized for
other construction on the project as may be specified or
ordered by the Engineer. To the extent practicable,
granular materials and topsoil shall be segregated from
other materials during the excavating and stockpiling
operations so as to permit best use of the available
materials at the time of backfilling. Unless otherwise
specified in the Plans, Specifications, and Special
Provisions, material handling as described above shall be
- 57 - t
'
considered incidental i h n
w t o additional compensation
provided therefor.
'
All excavated materials reserved for backfill or other
use on the project shall be stored at locations approved by
' the Engineer that will cause a minimum of inconvenience to
public travel, adjacent properties, and other special
interests. The material shall not be deposited so close to
' the edges of the excavations as would create hazardous
conditions
nor shall any material be
laced
t
bl
k
,
p
so as
o
oc
the access to emergency services. All materials considered
unsuitable by the Engineer, for any use on the project,
' shall be immediately removed from the project and be
disposed of as arranged by the Contractor at no extra cost
to the Contract.
B3 .Excavation Limitations and Requirements
' Trench excavating shall be to a depth that will permit
preparation of the foundation as specified and installation
of the pipeline and appurtenances at the prescribed line
and grade, except where alterations are specifically
' authorized. Trench widths shall be sufficient to permit the
pipe to be laid and joined properly and the backfill to be
' placed and compacted as specified. Extra width shall be
provided as necessary to permit convenient
lacement of
p
sheeting and shoring and to accommodate placement of
appurtenances.
' Excavation
h
ll b
s s
a
e extended below the bottom of
structure as necessary to accommodate any required Granular
Foundation material. When rock or unstable foundation
' materials are encountered at the established grade,
additional materials shall be removed as specified or
ordered by the Engineer to produce an acceptable founda-
tion. Unless otherwise indicated or directed, rock shall be
removed to an elevation at least six inches below the
bottom surface of the pipe barrel and below the lowest
' projection of joint hubs. All excavations below grade shall
be to a minimum width to the outside pipe diameter plus two
feet. Rock shall be removed to such additional horizontal
' dimensions as will provide a minimum clearance of six
inches on all sides of a
urte
t
t
t
pp
nan
s
ruc
ures such as
valves, housings, access structures, etc.
' Where no other grade controls are indicated or esta-
blished for the pipeline, the excavating and foundation
preparations shall be such as to provide a minimum cover
' over the top of the pipe as specified. Trench widths shall
allow for at least six inches of clearance on each side of
the joint hubs. The maximum allowable width of the trench
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at the top of pipe level shall be the outside diameter of
the pipe plus two feet, subject to the considerations for
alternate pipe loading set forth below. The width of the
trench at the ground surface shall be held to a minimum to
prevent unnecessary destruction of the surface structures.
The maximum allowable trench width at the level of the
top of pipe may be exceeded only by approval of the
Engineer, after consideration of pipe strength and loading
relationships. Any alternate proposals made by the Contrac-
tor shall be in writing, giving the pertinent soil weight
data and proposed pipe strength alternate, at least seven
days prior to the desired date of decision. Approval of
alternate pipe designs shall be with the understanding that
there will be no extra compensation allowed for any
increase in material or construction costs.
If the trench is excavated to a greater width than that
authorized, the Engineer may direct the Contractor to
provide a higher class of bedding and/or a higher strength
pipe than that required by the Plans, Specifications, and
Special Provisions in order to satisfy design requirements,
without additional compensation therefor.
84 Sheeting and Bracing Excavations
All excavations shall be sheeted, shored, and braced as
will meet all requirements of the applicable safety codes
and regulations; comply with any specific requirements of
the Contract; and. prevent disturbance or settlement of
adjacent surfaces, foundations, structures, utilities, and
other properties. Any damage to the work under contract or
to adjacent structures or property caused by settlement,
water or earth pressures, slides, cave-ins, or other. causes
due to failure or lack of sheeting, shoring, or bracing or
through negligence or fault of the Contractor in any
manner, shall be repaired at the Contractor's expense and
without delay.
Where conditions warrant extreme care, the Plans,
Specifications, and Special Provisions may require special
precautions to protect life or property, or the Engineer
may order the installation of sheet piling of the
interlocking type or direct that other safety measures be
taken as deemed necessary. Failure of the Engineer to order
correction of improper or inadequate sheeting, shoring, or
bracing shall not relieve the Contractor's responsibilities
for protection of life, property, and the work.
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The Contractor shall assume full responsibility for ,
proper and adequate placement of sheeting, shoring, and
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bracing, wherever and to such depths that soil stability
may dictate the need for support to prevent displacement.
Bracing shall be so arranged as to provide ample working
space and so as not to place stress or strain on the
inplace structures to any extent that may cause damage.
Sheeting, shoring and bracing materials shall be removed
only when and in such manner as will assure adequate
protection of the inplace structures and prevent displace-
ment of supported grounds. Sheeting and bracing shall be
left in place only as required by the Plans, Specifica-
tions, and Special Provisions or ordered by the Engineer.
Otherwise, sheeting and bracing may be removed as the
backfilling reaches the level of respective support.
Wherever sheeting and bracing is left in place, the upper
portions shall be cut and removed to an elevation of three
feet or more below the established surface grade as the
Engineer may direct.
All costs of furnishing, placing, and removing sheeting,
shoring, and bracing materials, including the value of
materials left in place as required by the Contract, shall
be included in the prices bid for pipe installation and
will not be compensated for separately. When any sheeting,
shoring, or bracing materials are left in place by written
order of the Engineer, in the absence of specific
requirements of the Contract to do so, payment will be made
for those materials as an Extra Work Item, including waste
material resulting from upper cut-off requirements.
B5 Preparation and Maintenance of Foundations
Foundation preparations shall be conducted as necessary
to produce a stable foundation and provide continuous and
uniform pipe bearing between bell holes. The initial
excavating or backfilling operations shall produce a
subgrade level slightly above finished grade as will permit
hand shaping to finished grade by trimming of high spots
and without the need for filling of low spots to grade.
Final subgrade preparations shall be such as to produce a
finished grade at the centerline of the pipe that is within
0.03 foot of a straight line between pipe joints and to
provide bell hole excavation at each joint as will permit
proper joining of pipe and fittings.
In excavations made below grade to remove rock or
unstable materials, the backfilling to grade shall be made
with available suitable materials unless placement of
Granular Foundation or Bedding material is specified and
provided for or is ordered by the Engineer as an Extra Work
Item. Placement of the backfill shall be in relatively
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uniform layers not exceeding 8 inches in loose thickness.
Each layer of backfill shall be compacted thoroughly, by
means of approved mechanical compaction equipment, as will
produce uniform pipe support throughout the full pipe
length and facilitate proper shaping of the pipe bed.
Where the foundation
materials that the Engine
to preclude removal and
to achieve solid support
constructed as the Eng~
special requirements ther
and Special Provisions.
furnish and drive piling
bearing supports or other
Extra Work order.
soil is found to consist of
per considers to be so unstable as
replacement to a reasonable depth
a suitable foundation shall be
neer directs in the absence of
sfor in the Plans, Specifications,
Che Contractor may be required to
and construct concrete or timber
work as may be provided for in an
Care shall be taken during final subgrade shaping to
prevent any over-excavation. Should any low spots develop,
they shall only be filled with approved material, which
shall have optimum moisture content and be compacted
thoroughly, without additional compensation provided to the
Contractor. The finished subgrade shall be maintained free
of water and shall not be disturbed during pipe .lowering
operations except as necessary to remove pipe slings. The
discharge of trench dewatering pumps shall be directed to
natural drainage channels or storm water drains. Draining
trench water into sanitary sewers or combined sewers will
not be permitted.
The Contractor shall install and operate a dewatering
system of wells or points to maintain pipe trenches free of
water wherever necessary or as directed by the engineer to
meet the intent of these specifications. Unless otherwise
specified in the Plans, Specifications, and Special
Provisions, such work shall be considered incidental with
no additional compensation provided therefore.
R11 costs of excavating below grade and placing
foundation or bedding aggregates as required shall be
included in the bid prices for pipe items to the extent
that the need for such work is indicated in the Contract
provisions and the Proposal does not provide for payment
therefor under separate Contract Items. Any excavation
below grade and any foundation or bedding aggregates
required by order of the Engineer in the absence of
Contract requirements therefor will be compensated for
separately as Extra Work Items.
If examination by the Engineer reveals that the need for
placement of foundation aggregates was caused by the
Contractor's manipulation of the soils in the presence of
excessive moisture or lack of proper dewatering, the cost
of the corrective measures shall be borne by the Contractor.
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C Installation of Pi a and Fittin
p gs
' Cl Inspection and Handling
Proper and adequate implements, tools, and facilities
satisfactory to the Engineer shall be provided and used by
' the Contractor for the safe and convenient prosecution of
the work. During the process of unloading, all pipe and
accessories shall be inspected by the Contractor for
' damage. The Contractor shall notify the Engineer of all
material found to have cracks, flaws or other defects. The
Engineer shall inspect the damaged materials and have the
right to reject any materials found to be unsatisfactory.
' The Contractor shall promptly remove all rejected material
from the site. All materials shall be handled carefully, as
' will prevent damage to protective coatings, linings, and
joint fillings; preclude contamination of int
rio
e
r areas;
and avoid jolting contact, dropping, or dumping.
' All work and materials are subject to tests by the Owner
at such frequency as may be determined by the Engineer.
Such tests shall be paid for by the Owner.
' While suspended and before being lowered into laying
position, each pipe section and appurtenant unit shall be
inspected by the Contractor to detect damage or unsound
' conditions that may need corrective action or be cause for
rejection. The Contractor shall inform the Engineer of any
defects discovered and the Engineer will prescribe the
required corrective actions or order rejection.
Immediately before placement, the joint surfaces of each
' pipe section and fitting shall be inspected for the
presence of foreign matter, coating blisters, rough edges
or projections, and any imperfections so detected shall be
corrected by cleaning, trimming, or repair as needed.
C2 Pipe Laying Operations
Trench excavation and bedding preparations shall proceed
ahead of pipe placement as will permit proper laying and
joining of the units at the prescribed grade and alignment
without unnecessary deviation or hindrance.
All foreign matter or dirt shall be removed from the
' inside of the pipe and fittings before they are lowered
into position in the trench and they shall be kept clean by
approved means during and after laying. The sewer materials
shall be carefully lowered into laying position by the use
' of suitable restraining devices. Under no circumstances
shall the pipe be dropped into the trench.
' - 62 -
At the time of pipe placement,
shall be such as to provide uniform
for the pipe between bell holes.
excavated as necessary to make the
they shall be no larger than would
the pipe throughout its length. No
laid in water nor when the trench or
otherwise unsuitable or improper.
the bedding conditions
and continuous support
Bell holes shall be
joint connections, but
be adequate to support
pipe. material shall be
bedding conditions are
n
When placement or handling precautions prove inadequate,
in the Engineer's opinion, the Contractor shall provide and
install suitable plugs or caps effectively closing the open
ends of each pipe section before it is lowered into laying
position, and they shall remain so covered until removal is
necessary for connection of an adjoining unit.
Unless otherwise permitted by the Engineer, bell and
spigot pipe shall be laid with the bell ends facing upgrade
and the laying shall start on the downgrade end and proceed
upgrade. As each length of bell and spigot pipe is placed
in laying position, the spigot end shall be centered in the
bell and the pipe forced home and brought to correct line
and grade. The pipe shall be secured in place with
approved backfill material, which shall be thoroughly
compacted by tamping around the pipe to a height of at
least 12 inches above the top with hand operated mechanical
tamping devices or by hand. The joint areas shall remain
exposed and precautions shall be taken to prevent the soil
from entering the joint space, until the joint seal is
effected. Backfill in the bell area shall be left loose.
Connection of pipe to existing lines or previously
constructed manholes or catch basins shall be accomplished
as shown in the Plans or as otherwise approved by the
Engineer. Where necessary to make satisfactory closure or
produce the required curvature, grade or alignment deflec-
tions at joints shall not exceed that which will assure
tight joints and comply with any limitations recommended by
the pipe manufacturer.
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Entrance of foreign matter into pipeline openings shall t
be prevented at all times to the extent that suitable plugs
or covering can be kept in place over the openings without
interfering with the installation operations.
Installation of PVC, ABS, and composite truss pipe shall
conform to ASTM D-2321.
C3 Connection and Assembly of Joints
All pipe and fitting joints shall fit tightly and be
n
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' fully closed. Spigot ends shall be marked as necessary to
indicate the point of complete closure. All joints shall be
soil tight, as the minimum requirement, and shall be
watertight in all .sanitary sewer pipe lines and in all
storm sewer pipe lines installed within the limits of a
paved street or highway traffic lanes. Where specified, the
joints in certain assemblies shall be made structurally
integral by being completely encased in concrete to form a
rigid watertight unit as indicated in the standard
' drawings.
Where watertight joints are required, without concrete
encasement, the joints shall be sealed as follows, subject
' to such other approved method as the Engineer may authorize
as being an acceptable alternative:
' (1) Concrete pipe and fitting joints--compression type
rubber gasket seals conforming to the requirements of
ASTM C-443, ASTM C-361 or AASHTO M-198 for circular
' pipe, or as otherwise approved by the Engineer in the
case of non-circular pipe sections.
(2) ABS/PVC Truss pipe, ABS solid wall pipe and fittings-
' assembled gasket seal joints.
(3) Smooth wall and corrugated wall PVC pipe and fittings-
assembled push-on gasketed joints shall pass perfor-
mance tests as listed in ASTM D-3212. Solvent welds
shall not be permitted.
(4) Vitrified clay pipe and fittings--factory fabricated
compression seals or compression type couplings.
' (5) Corrugated steel pipe and fittings--sealed with
approved type compression seals.
Where watertight joints are not required, joints in
concrete pipe shall be made soil tight by filling with
mortar as the Engineer directs. Pipe joints encased in
concrete will not have to be sealed with gasket type seals,
' but shall be filled with mortar as directed.
' C4 Bulkheading Open Pipe Ends
All pipe and fitting ends left open for future
connection shall be bulkheaded by approved methods prior to
' backfilling. Unless otherwise specified or approved, all
openings of 24 inches in diameter or less shall be closed
off with prefabricated plugs or caps and all openings
larger than 24 inches in diameter shall be closed off with
masonry bulkheads.
' - 64 -
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Prefabricated plugs and caps shall be of the same
material as the pipe material, or an
material, and they shall be installed
as required for the pipeline joints
shall be constructed with clay or conc
thickness of eight inches.
approved_ alternate
with watertight seal '
Masonry bulkheads
rete brick to a wall
Bulkheads installed for temporary service during con-
struction may be constructed with two-inch timber planking
securely fastened together and adequately braced, as an
alternate to the masonry construction.
C5 Placement of Insulation
Rigid insulation board shall be placed within the pipe
encasement zone, 6 inches above the pipe. Prior to
placement of the insulation, encasement material shall be
compacted until there is no further visual evidence of
increased consolidation or the density of the compacted
layer conforms to the density requirements specified in the
Special Provisions, then leveled and lightly scarified to a
depth of 2 inch. Encasement zone material placed below the
insulation shall be free of rock or stone fragments
measuring 12 inches or greater.
Insulation boards shall be placed on the scarified
material with the long dimension parallel to the centerline
of the pipe. Boards placed in a single layer shall be
overlapped at least 6 inches on all sides to eliminate
continuous joints for the full depth of the insulation. If
two or more layers of insulation boards are used, each
layer shall be placed to cover the joints of the layer
immediately below with an overlap of at least 6 inches.
The Contractor shall exercise precaution to insure that
all joints between boards are tight during placement and
backfilling with only extruded ends placed end to end or
edge to edge.
The first layer of material placed over the insulation
shall be 6 inches in depth, free of rock or stone fragments
measuring 1'-z inches or greater. The material shall be
placed in such a manner that construction equipment does
not operate directly on the insulation and shall be
compacted with equipment which exerts a contact pressure of
less than 80 psi. The first layer shall be compacted until
there is no further visual evidence of increased consolida-
tion or the density of the compacted layer conforms to the
density requirements specified in the Special Provisions.
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D Appurtenance Installations
Appurtenance items such. as aprons, trash guards, gates
' and castings shall be installed where and as required by
the Plans and in accordance with such standard detail
drawings or supplementary requirements as may be specified.
Casting assemblies installed on manhole or catch basin
structures shall be set in a full mortar bed and be
' adjusted to the specified elevation without- the use of
shims or blocking.
Sewer aprons shall be subject to all applicable
' requirements for installation of pipe. All aprons and
outfall end sections shall have the last three sections
tied. Two tie bolt fasteners shall be placed in each of the
last three joints, one on each side of top center at the 60
degree point (from vertical). Tie bolt diameter shall be: z
inch for 12" to and including 21" pipe; 5/8 inch for 24" to
and including 36" pipe; 3/4 inch for 42" to and including
54" pipe; and 1" for 60" and lar
er
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p
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o
ts
shall be of a design approved by the Engineer.
E S
ewer Service Installations
' Main sewer service connections and building service
sewer pipe shall be installed as provided for in the
Contract and as may be directed by the Engineer. The sewer
service connections and pipe lines shall be installed in
' conformance with all applicable requirements of the main
sewer installation and as more specifically provided for
herein.
The Engineer, with the assistance of the Contractor,
shall keep accurate records of all service installations as
to type, location, elevation, point of connection and
termination, etc. This service record shall be maintained
jointly by the Contractor and Engineer on forms provided by
the Engineer. The service installations shall not be
' backfilled until all required information has been obtained
and recorded.
The main sewer
installing a Branch service connection shall consist of
Tee or W
e section i
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n e ma
n sewer
line at designated locations, or of providing an .insert
type Saddle Tee in a pipe cutout where and as permitted or
' required in lieu of the built-in fitting. Orientation of
service connection fitting shall be as shown in the
standard drawings unless otherwise directed by the Engineer.
1
' - 66 -
Where the depth of cover over the main sewer invert is
greater than 15 feet (or such other maximum as may be
indicated), the service connection shall be extended upward
by means of a Service Riser Section in accordance with the
details shown in the standard drawings.
Unless otherwise specified, service pipe shall be
installed at right angles to the main sewer and at a
straight line grade to the property line. The standard and
minimum grades shall be a uniform rise of one inch in four
feet for sanitary service lines and one inch in eight feet
for storm sewer service lines. These minimum grades may be
reduced (by not more than one-half pitch) where the
Engineer so approves in the case of restrictive elevation
differences.
Building. service pipe lines shall generally be kept as
deep as required to serve the building elevation and
maintain the specified minimum pipe grades. Pipe bends
shall be provided as necessary to bring the service lines
to proper location and grade. Pipe bends shall not exceed
22? degrees without approval of the Engineer.
Unless otherwise indicated, service pipe installation
shall terminate at property line or as designated on the
Plans, with a gasketed plug placed in the end, at which
point the Contractor shall furnish and set a 4 x 4 inch
wooden timber 6 feet to 8 feet in length embedded 4 feet
below grade, or approved steel post to mark the exact end
of pipe. The timber or post shall be set vertically, with
the top 2 feet painted green.
Wherever service line connections to the main sewer are
permitted or required to be made by the open cut-out method
in the absence of a built-in Tee or Wye fitting, the
connection shall be made by using an approved type of
Saddle Tee fitting. The pipe cut-out shall be made with an
approved type coring machine or by other approved methods
producing a uniform, smooth circular cut-out as required
for proper fit. The cut-out discs shall be retrieved and
shall not be allowed to remain within the main sewer pipe.
The Saddle Tee shall be securely fastened to the main sewer
pipe by means of epoxy resin or other approved adhesive.
The entire connection fitting shall be encased in concrete
to a minimum thickness of six inches and as may be shown in
the standard drawings.
Wherever service line connections to the main sewer are
required to be made by means of built-in Branch Tee or Wye
fittings, the Contractor shall, in the absence of such
fitting, remove a section of the main sewer pipe and
replace it with the required Branch Tee or Wye section
connected by means of an approved sleeve coupling.
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Sanitary sewer service lines shall not be connected to a
manhole at an elevation more than 24 inches above the crown
of the outgoing sewer. Where the elevation difference is
greater than 24 inches, the connection shall be made by
means of an Outside Drop Connection in accordance with the
details shown in the standard drawings.
All pipe and fitting openings at temporary terminal
points .shall be fitted with suitable plugs or shall be
bulkheaded as required for the main sewer pipe.
F Manhole and Catch Basin Structures
Manholes, catch basins, and other special access
structures shall be constructed at designated locations as
required by the Plans and in accordance with any standard
detail drawings or special design requirements given
therefor.
u
L
Unless otherwise specified or approved, manholes and
catch basins shall be constructed on a cast-in-place
concrete base and the barrel riser sections, cone. section
and top adjusting rings shall all be of precast concrete.
All units shall be properly fitted and sealed to form a
completely watertight structure. Barrel and cone height
shall be such as to permit placement of at least three and
not more than six standard two-inch precast concrete
adjusting rings immediately below the casting assembly
which shall be set in a mortar bed. Each adjusting ring
shall also be set in mortar.
Unless otherwise specified or approved, manholes and
catch basins shall have an inside barrel diameter at the
bottom of 48 inches minimum and the inside diameter at the
top of the cone section and of all adjusting rings shall be
of the same size and shape as the casting frame. Casting
assemblies shall be as specified in the Plans. Catch basin
grate elevation shall be adjusted as necessary to maintain
the required dip below normal gutter grade.
The concrete cast-in-place base shall be poured on
undisturbed or firmly compacted foundation material which
shall be trimmed to proper elevation. The bottom riser
section shall be set in fresh concrete or mortar and all
other riser section joints of the tongue and groove design
shall be sealed with rubber gaskets.
Wherever special designs so require or permit, and as
otherwise may be approved by the Engineer, a precast
concrete base may be used or the structure may be
constructed with .solid sewer brick or block units or with
cast-in-place concrete. Any combination of cast-in-place
- 68 -
concrete and brick or block mortar construction will be
allowed and may be required where it is impossible to
complete the construction with standard precast manhole
sections.
All annular wall space surrounding the inplace storm
sewer pipes shall be completely filled with mortar or
concrete, and the inside bottom of each manhole and catch
basin shall be shaped with fresh concrete to form free flow
through invert troughs as directed.
Sanitary sewer main lines shall not be connected to a
manhole at an elevation more than 24 inches above the
invert of the outgoing sewer. Where the difference is
greater than 24 inches, the connections shall be made by
means of an Outside Drop Connection in accordance with the
detailed drawings in the Plans. The concrete base under the
drop connection shall be monolithic with the manhole base.
G Reconnecting Existing Facilities
Disposition of abandoned facilities and reconnection of
existing facilities shall be as provided for in the Plans,
Specifications, and Special Provisions.
H Sanitary Sewer Leakage Testing
All sanitary sewer lines, including service connections,
shall be substantially watertight and shall be tested for
excessive leakage upon completion and before connections
are made to the service by others. Each test section of the
sewer shall be subjected to exfiltration testing, either by
hydrostatic or air test method as described below and at
the Contractor's option. The requirements set forth for
maximum leakage shall be met as a condition for acceptance
of the sewer section represented by the test.
If the ground water level is greater than three feet
above the invert elevation of the upper manhole and the
Engineer so approves, infiltration testing may be allowed
in lieu of the exfiltration testing, in which case the
allowable leakage shall be the same as would be allowed for
the Hydrostatic Test.
All testing shall be performed by the Contractor without
any direct compensation being made therefor, and the
Contractor shall furnish all necessary equipment and
materials, including plugs and standpipes as required.
H1 Air Test Method.
The sewer pipe section under test shall be clean at the
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time of testing but the pipe may be wetted. Pneumatic balls
shall be used to plug the pipe ends at manholes. Low
pressure air shall be introduced into the plugged line
until the internal air pressure reaches 4.0 psi greater
than the average back pressure of any ground water pressure
that may submerge the pipe. At least two minutes shall be
allowed for the air temperature to stabilize before
readings are taken and the timing started. During this time
the Contractor shall check all plugs with soap solution to
detect plug leakage. If plugs are found to leak, air shall
be bled off, the plugs shall be retightened, and the air
shall be reintroduced into the line.
The sewer section under test will be accepted as having
passed the air leakage test if it does not lose air at a
rate to cause the pressure to drop from 3.6 to 3.0 psi in
less time than one-half minute per inch in diameter of the
pipe tested.
HZ Hydrostatic Test Method
After bulkheading the test section, the pipe shall be
subjected to a hydrostatic pressure produced by a head of
water at a depth of three feet above the invert elevation
of the sewer at the manhole of the test section. In areas
where ground water exists, this head of water shall be
three feet above the existing water table..
The water head shall be maintained for a period of one
hour during which time it will be presumed that full
absorption of the pipe body has taken place, and thereafter
for an extended period of one hour the water head shall be
maintained as the test period. During the one hour test
period, the measured water loss within the test section,
including service stubs, shall not exceed the Maximum
Allowable Loss (in Gallons Per Hour per 100 Feet of Pipe)
given below for the applicable Main Sewer Diameter.
Main Sewer Diameter
(In Inches)
6
8
10
12
15
18
21
24 & Larger
Maximum Allowable Loss*
(In Gallons Per Hour Per 100 Feet)
0.5
0.6
0.8
1.0
1.2
1.4
1.7
1.9
*Based on 100 Gallons Per Day Per Pipe Diameter Inch Per Mile
- 70 -
If measurements indicate exfiltration within a test
section is not greater than the allowable maximum, the
section will be accepted as passing the test.
H3 Test Failure and Remedy
In the event of test failure on any test section,
testing shall be continued until all leakage has been
detected and corrected to meet the requirements. All repair
work shall be subject to approval of the Engineer.
Introduction of sealant substances by means of the test
water will not be permitted.
Unsatisfactory repairs or test results may result in an
order to remove and replace pipe as the Engineer considers
necessary for test conformance. All repair and replacement
work shall be at the Contractor's expense.
I Pipeline Backfilling Operations
All pipeline excavations shall be backfilled to restore
pre-existing conditions as the minimum requirement, and
fulfill all supplementary requirements indicated in the
Plans and Specifications, and Special Provisions. The
backfilling operations shall be started as soon as
conditions will permit on each section of pipeline, so. as
to provide continuity in subsequent operations and restore
normal public service as soon as practicable on a
section-by-section basis. All operations shall be pursued
diligently, with proper and adequate equipment, as will
assure acceptable results.
The backfilling shall be accomplished with the use of
Suitable Materials selected from the excavated materials to
the extent available and practical. Should the materials
available within the trench section be unsuitable or
insufficient, without loading and hauling or the employment
of unreasonable measures, the required additional materials
shall be furnished from outside sources as an Extra Work
item in the absence of any Special Provisions requirements.
Suitable Material shall be defined as a mineral soil
free of foreign materials (rubbish, debris, etc.), frozen
clumps, oversize stone, rock, concrete or bituminous
chunks, and other unsuitable materials, that may damage the
pipe installation, prevent thorough compaction, or increase
the risks of after settlement unnecessarily. Material
selection shall be such as to make the best and fullest
utilization of what is available, taking into consideration
particular needs of different backfill zones. Material
containing stone, rock, or chunks of any sort shall only be
utilized where and to the extent there will be no
detrimental effects.
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Within the pipe bedding and encasement zones described
as that portion of the trench which is below an elevation
one foot above the top of the pipe, the materials placed.
shall be limited in particle size to 1'-z inches maximum in
the case of pipe of 12 inches in diameter or less, and to 2
inches maximum in the case of larger pipe. Above these
zones, the placement of material containing stones,
boulders, chunks, etc. greater than 8 inches in any
dimension shall not be allowed.
Compaction of materials placed within the pipe bedding
and encasement zones shall be accomplished with portable or
hand equipment methods, so as to achieve thorough consoli-
dation under and around the pipe and avoid damage to the
pipe. Above the cover zone material, the use of heavy
roller type compaction equipment shall be limited to safe
pipe loading.
' Backfill materials shall be carefully placed in uniform
loose thickness layers of 8 inches spread over the full
width and length of the trench section to provide
' simultaneous support on both sides of the pipeline.
Granular Backfill may be placed in 12-inch layers above an
elevation one foot above the top of the pipe, and with the
provision that, by authority and at the discretion of the
Engineer in consideration of the demonstrated capability of
special type vibrating compactors, the stated maximums may
be increased.
' Each layer of Backfill material shall be compacted
effectively, by approved mechanical or hand methods, until
there is no further visual evidence of increased consoli-
' dation or the density of the compacted layer conforms to
the density requirements specified in the Special Provi-
sions. Compaction of the inplace layer shall be completed
' acceptably before placing material for a succeeding layer
thereon. The manner of placement, compaction equipment and
procedure effectiveness shall be subject to approval of the
Engineer.
All surplus waste materials remaining after completion
of the backfilling operations shall be disposed of in an
' acceptable manner within 24 hours after completing the
Backfill work on each particular pipeline section. Disposal
at any location within the project limits shall be as
' specified, or as approved by the Engineer; otherwise,
disposal shall be accomplished outside the project limits
at the Contractor's discretion. The backfilling and surplus
' or waste disposal operations shall be a part of the work
required under the pipeline installation items, not as work
that may be delayed until final cleanup.
- 72 -
Until expiration of the guarantee period, the Contractor
shall assume full responsibility and expense for all
backfill settlement and shall refill and restore the work
as directed to maintain an acceptable surface condition,
regardless of location. All additional materials required
shall be furnished without additional cost to the Owner.
J Restoration of Surface Improvements
Wherever any surface improvements such as pavement,
curbing, pedestrian walks, fencing, or turfing have been
removed, damaged or otherwise disturbed by the Contractor's
operations, they will be repaired or replaced to the
Engineer's satisfaction, as will restore the improvement in
kind and structure to the preexisting condition. Each item
of restoration work shall be done as soon as practicable
after completion of installation and backfilling operations
on each section of pipeline.
In the absence of specific payment provisions, as
separate Contract Items, the restoration work shall be
compensated for as part of the work required under those
Contract Items which necessitated the destruction and
replacement or repair, and there will be no separate
payment therefor. If separate pay items are provided for
restoration work, only that portion of the repair or
reconstruction which was necessitated by the Contract work
will be measured for payment. Any improvements removed or
damaged unnecessarily or undermined shall be replaced or
repaired at the Contractor's expense.
J1 Turf Restoration
Turf restoration shall be accomplished by sod placement
except where seeding is specifically allowed or required.
Topsoil shall be placed to a minimum depth of four
inches under all sodding and in all areas seeded. The
topsoil material used shall be light friable loam contain-
ing a liberal amount of humus, and shall be free of heavy
clay, course sand, stones, plants, roots, sticks and other
foreign matter. Topsoil meeting these requirements shall be
selected from the excavated materials to the extent
available and needed.
All turf establishment work shall be done in substantial
compliance with the provisions of MnDOT Specification 2575.
Seed shall be Mixture No. 5 of MnDOT Specification 3876,
unless otherwise directed or approved.
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J2 Pavement Restoration
The inplace pavement structure (including base aggre-
gates) shall be restored in kind and depth as previously
existed, using base aggregates salvaged from the excavated
materials to the extent available and needed, and with new
materials being provided for reconstruction of the concrete
or bituminous surface courses.
If, through no fault of the Contractor in failing to
reserve sufficient aggregate materials from the excava-
tions, there should be insufficient quantity of suitable
aggregate to reconstruct the pavement base courses, the
additional materials required will be furnished by the
Owner at its expense, or the Contractor will be ordered to
furnish the additional materials from outside sources as an
Extra Work item in the absence of an appropriate Contract
item therefor. Placement of any additional aggregate
materials delivered to the site by the Owner or of any
additional materials furnished by the Contractor, shall be
an incidental expense, as will also be the disposal of any
excess materials resulting therefrom, unless special
payment provisions are otherwise agreed upon.
Reconstruction of aggregate base courses and concrete or
bituminous surface courses shall be in substantial compli-
ance with all applicable MnDOT Specifications pertaining to
the item being restored. The materials used shall be
comparable to those used in the inplace structure, and the
workmanship and finished quality shall be equal to that of
new construction to the fullest extent obtainable in
consideration of .operational restrictions.
Existing concrete and bituminous surfaces at the trench
wall shall be sawed or cut with a cutting wheel to form a
neat edge in a straight line before surfaces are to be
restored. Sawing or cutting may be accomplished as a part
of the removal or prior to restoration at the option of the
Contractor. However, all surface edges will be inspected
prior to restoration.
J3 Restoration of Miscellaneous Items
Wherever any curbing, curb and gutter sections, pedes-
trian walks, fencing, driveway surfacing, or other improve-
ments are removed or in any way damaged, or undermined,
they shall be restored to original condition by repair or
replacement as the Engineer considers necessary. Replace-
ment of old materials will be acceptable only to the extent
that existing quality can be fully achieved, such as in the
case of fencing. Otherwise new materials shall be provided
- 74 -
and placed as the Engineer directs. Workmanship and
finished quality shall be equal to that of new construc-
tion, where new materials are used, to the extent
obtainable in consideration of operational restrictions.
A proper foundation shall be prepared before reconstruc-
ting concrete or bituminous improvements. Unless otherwise '
directed, granular material shall be placed to a depth of
at least four inches under all concrete and bituminous
items. No direct compensation will be made for furnishing
and placing this material even though such course was not '
part of the original construction.
K Maintenance and Final Cleanu
P
All subgrade surfaces shall be maintained acceptably
until the start of surfacing construction or restoration ,
work, and until the work has been finally accepted.
Additional materials shall be provided and placed as needed
to compensate for trench settlement and to serve as ,
temporary construction pending completion of the final
surface improvements.
Final disposal of debris, waste materials, and other
remains or consequences. of construction, shall be accom-
plished intermittently as new construction items are.
completed and shall not be left to await final completion '
of all work. Cleanup operations shall be considered as
being a part of the work covered under the Contract items
involved and only that work which cannot be accomplished at e
any early time shall be considered as final cleanup work
not attributable to a specific Contract Item.
If disposal operations and other cleanup work are not '
conducted properly as the construction progresses, the
Engineer may withhold partial payments until such work is
satisfactorily pursued, or he may deduct the estimated cost ,
of its performance from the partial estimate value.
Maintenance of sodded and seeded areas shall include '
adequate watering for plant growth and the replacement of
any dead or damaged sod as may be required for acceptance
of the work. '
L Deflection Test '
Deflection tests shall be performed on all plastic
gravity sewer pipes. The test shall be conducted after the
sewer trench has been backfilled to the desired finished ,
grade and has been in place for 30 days.
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The deflection test shall be performed by pulling a
rigid ball or pointed mandrel through the pipe without the
aid of mechanical pulling devices. The ball or mandrel
shall have a minimum diameter equal to 95% of the actual
inside diameter of the pipe. The maximum allowable
deflection shall not exceed five percent of the pipe's
' internal diameter. The time of the test, method of testing,
and the equipment to be used for the test shall be subject
to the approval of the Engineer.
' All testing shall be performed by the Contractor at his
expense without any direct compensation being made there-
' for, and he shall furnish all necessary equipment and
materials required.
' L1 Test Failure and Remedy
In the event of test failure on any test section, the
section shall be replaced, with all repair work subject to
' approval of the Engineer. The replaced section shall be
retested for leakage and deflection in conformance with the
specifications contained herein. All repairs, replacement,
' and retesting shall be at the Contractor's expense..
M Televising
' Sewer line televising may be required by the Engineer,
at the cost of the Contractor, if visual inspection,
leakage testing, or deflection testing, indicate the sewer
has not been constructed in accordance with these specifi-
' cations and the requirements of the Plans, Specifications
and Special Provisions.
'
2621.4 METHOD OF MEASUREMENT
All items will be measured separately according to design
designation as indicated in the Pay Item name and as may be
detailed and defined in the Plans, Specifications, or Special
Provisions. Pipe will generally be designated by size (inside
' diameter or span), strength class, kind or type, and laying
condition. Complete-in-place items shall include all component
parts thereof as described or required to complete the unit, but
excluding any excesses covered by separate Pay Items. Linear
' measurement of piping will include the running .length of any
special fittings (tees, wyes, elbows, gates, etc.) installed
' within the line of measure between specified terminal points.
A Sewer-Pipe
' Sewer pipe of each design designation will be measured
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by length in linear feet along the line of pipe. Terminal
points of measurement will be the pipe end at free outlets;
the point of connection with inplace pipe; the center of
manholes or catch basins; the point of centerline intersec-
tions at branch fittings; or the point of juncture with '
other appurtenances or units as defined.
Separation of quantities according to "depth zone
classification", when so designated in the Pay Item, will '
be determined by depth of pipe invert below the ground
surface profile.
B Manholes
Manholes of each design designation will be measured by
number of each constructed complete-in-place, including the ,
base and castings as required, but excluding any excess
depth greater than 8.0 feet measured from top of manhole
cover to invert elevation of lowest pipe.
Excess manhole depth of each design designation will be
measured by the linear foot difference in depth between the
8.0 feet allowed as standard and the actual increased depth
as constructed.
C Catch Basins
Catch basins of each design designation will be measured
by number of each constructed complete-in-place, including e
the base and castings as required, but excluding any excess
depth greater than 5.0 feet measured from top of grate (low
point) to invert elevation of lowest outlet pipe. t
Excess catch basin depth of each design designation will
be measured by the linear foot difference in depth between '
the 5.0 feet allowed as standard and the actual increased
depth as constructed.
D Outside Drop Connection
Outside drop connections of each design will be measured '
by number of each constructed complete-in-place, .including
granular encasement, fittings, and any special piping
details as required, including two holes into existing '
manholes for the drop connection, but excluding any excess
vertical drop greater than 2.0 feet measured between invert
of high pipe inlet and invert of low pipe outlet.
Excess drop connection depth will be measured by the '
linear foot difference in vertical drop between the 2.0
feet allowed as standard and the actual increased vertical '
drop as constructed.
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E Service Connection
Service Connections of each design will be measured by
number of each constructed complete-in-place as specified.
F Service Pipe
Service pipe of each design will be measured separately
by length in linear feet, horizontally along the line of
installation, between the service end and the point of
juncture with the main pipe connection fitting.
G Special Pipe Fittings
Special pipe fittings (wyes, tees, bends, etc.) of each
design designation will be measured by number of each
installed complete-in-place as specified, but excluding any
such fittings required to be installed as a component part
of any other Work Unit.
H Appurtenant Items
Appurtenant items such as aprons, trash guards, gates
and other prefabricated units or assemblies as identified
by Pay Item name will be measured separately by number of
each installed complete-in-place as specified.
I Granular Materials
Granular materials furnished and placed as special
foundation, bedding, encasement, or backfill construction
will be measured by weight or volume of material furnished
by the Contractor from outside sources and placed within
the limits defined. Unless otherwise specified, volume will
be determined by vehicular measure (loose volume) at the
point of delivery. Measurements will not include any
materials required to be placed as a component part of any
other Work Unit.
J Piling
Piling shall be measured according to the Provisions of
MnDOT Specification 2452.
J1 Pile Bents
Pile bents shall be measured as a unit and shall include
all materials and labor required, except the pile.
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K Insulation
ii
Rigid board insulation shall be measured on a square
foot basis installed to the specified thickness noted on
the Plans, Specifications, and Special Provisions and shall
include all materials and labor required for placement.
2621.5 BASIS OF PAYMENT
Payment for sewer. pipe and service pipe items at the
Contract prices per linear foot of pipe of each design shall be
compensation in full for all costs of providing a complete-in-
place pipeline, including excavation, foundation preparation,
backfilling, leakage testing, restoration of surface improve-
ments, disposal of surplus or waste materials, final cleanup,
and such other work as may be specified, but excluding the
construction of other structures or special sections and the
placement of special fittings, appurtenances or materials
specifically designated for payment under other Contract Items.
Payment for manhole, catch basin, outside drop connection,
service connection, and other structures as specified, at the
Contract prices per structure, shall be compensation in full for
all costs of constructing each unit complete-in-place as
specified, including all required castings, special fittings,
base or encasement, and appurtenant materials as specified for
the complete structure or section, but excluding such additional
work as may be designated for payment under other Contract
Items.
Where the specified standard manhole, catch basin, or outside
drop connection depths are exceeded, the excess depth of each
design will be paid for separately as linear footage items and
payment at the Contract prices therefor shall be compensation in
full for all costs of providing the extra depth.
Special pipe fittings such as wyes, tees and bends will be
paid for as separate Contract Items to the extent they are
required to be installed in the sewer pipe and service pipe
lines and not as a component part of a complete-in-place
structure (outside drop connections, service connections, etc.)
appurtenant items such as aprons, trash guards, drainage
gates, and other prefabricated- units or assemblies and specials
as designated will be paid for as separate Contract Items to the
extent they are not included as a component part of any
complete-in-place structure.
Granular materials furnished for foundation, bedding, cover,
or backfill placement as specified in connection with pipe or
structure items will only be paid for as separate Contract Items
to the extent that the Proposal contains specific Pay Items
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File No.
City
Addition
Street
Block Lot Sheet No.
Service No.
Address:
LJ
J
Contractor
Installed By
Tied By
Date
Sewer Service
Sta. Bet. M.H. 3c M.H:
Ihstezre FYnn I~r~strean M.H. I~b.
Me.t. Length Depth @ F.L.
Inv. @ P.L.
Water Service
Sta. Bet. M.H. 3C M.H.
Easta-~ce Fran lk~nstr~n M.H. I~b.
Mat. Length Depth @ P.L.
' Address:
1
n
Block IAt Sheet No.
Service No.
Sewer Service
Sta. Bet. M.H. ~C M.H.
Lb.starrw Finn Ib~nstr~n M.H. I~b.
N~,t. I~ngth Dept. @ F.L.
Inv. @ P. L.
Water Service
Sta. Bet. M.H. ~C M.H.
Easter Finn Datinstr~n t~.H. I~b.
Nra,t. I~ngth Depth @ F.L.
0