1998-02 JPWB Watermain Requirements
FEBRUARY 1998
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
JOINT POWERS WATER BOARD
STANDARD REQUIREMENTS
FOR CONSTRUCTION
OFWATERMAIN
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
),
4. TESTING
40
A.
B.
C.
D.
E.
Disinfection of Water Mains
Hydrostatic Testing of Water Mains
Electrical Conductivity Test - Ductile Iron Water Main
Trace Wire Test - PVC Water Main
Operational Inspection
40
44
46
47
47
5. METHOD OF MEASUREMENT 48
A. Water Main 48
B. Valves 48
C. Hydrant with Valve 48
D. Fittings 48
E. Granular Material 50
F. Boring 50
G. Water Service Connection 50
H. Service Lines 50
1. Insulation 50
J. Raise Valve Box 50
6. BASIS OF PAYMENT 51
A. Water Main 51
B. Valves 51
C. Hydrant with Valve 51
D. Fittings 51
E. Granular Material 51
F. Boring 51
G. Water Service Connection 51
H. Service Lines 51
1. Insulation 52
J. Raise Valve Box 52
SPEC-745.000
Index 3-ii
745000m
3
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
A.2
A.1. a Fittings: Fittings shall be Gray Iron or Ductile Iron, manufactured
in the United States, having a minimum working pressure rating of
150 psi, and shall confonn to the requirements of A WW A ClIO
(ANSI A21.lO), Ductile-Iron and Gray-Iron Fittings or AWWA
C153 (ANSI 21.53), Ductile-Iron Compact Fittings.
A.l. b Lining and Coating: All pipe and fittings shall be furnished with
cement mortar lining meeting the requirements of A WW A CI04
(ANSI AlIA) for standard thickness lining. All interior and
exterior surfaces of the pipe and fittings shall have a tar or
bituminous seal coating at least one mil thick. Spotty or thin seal
coating, or poor coating adhesion, shall be cause for rejection.
A.1.c fuints: Pipe three inches and larger in diameter shall have push-on
joints. Fittings shall have mechanical joints. The rubber gasket
shall confonn to AWWA C11I (ANSI A21.11).
A.l.d Electrical Conductivity: Copper straps shall be welded or
otherwise permanently affixed to each pipe or appurtenance to
provide a positive means of conveying electricity from pipe or
fitting, to pipe or fitting. Conductive pipe gaskets may be used on
pipe to pipe connections if approved by the Engineer. Size and
method of affixing strap shall be subject to the approval of the
Engineer and shall be sufficient to meet or exceed the criteria for
conductivity testing set forth in this specification.
Polyvinvl Chloride Pipe: Polyvinyl chloride pipe (PVC) for water main
shall conform to A WW A C 900 for pipe 4" through 12" in diameter, and
shall conform to A WW A C905 for pipe 14" or larger in diameter. All pipe
4" through 12" in diameter shall have a minimum dimension ratio (DR) of
18 corresponding to a working pressure of 150 psi for PVC type 1120 pipe.
All pipe 14" or larger in diameter shall have a minimum dimension ration
(DR) of 25 corresponding to a working pressure of 165 psi for PVC type
1120 pipe.
A.2.a Fittings: Fittings shall be Gray Iron or Ductile Iron, manufactured
in the United States, having a minimum working pressure rating of
150 psi, and shall conform to the requirements of A WW A CllO
(ANSI A21.1O), or AWWA C153 (ANSI 21.53)"Ductile-Iron
Compact Firtings.
A.2.b Joints: Joints in plastic pipe shall be bell-end elastomeric-gasket
type.
3 - 2
745000m
b
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
BA Hydrants shall have two outlet nozzles for 2-1/2 inch (I.D.) hose connection
and one outlet nozzle for 4-1/2 inch (1.D.) pumper connection. Threads
shall conform to NFPA No. 194 (ANSI B26) and shall be: hose connection
- 7-1/2 threads per inch, 3.062" nominal outside diameter (National
Standard Thread); pumper connection - 4 threads per inch, 5.750" nominal
outside diameter (National Standard Thread). Nozzle caps shall be nut type
with chain.
B.5 Hydrant operating mechanisms shall be provided with "0" ring seals
preventing entrance of moisture and shall be lubricated through an opening
in the operating nut or bonnet.
B.6 Drain holes shall be left open unless indicated otherwise, if so indicated the
hydrant shall be tagged "Pump After Use".
B.7 The Contractor shall provide the Owner with one hydrant wrench for every
ten (10) hydrants supplied or portion thereof. Cost of the wrenches shall
be incidental to the project.
B.8 Every fire hydrant shall be supplied with a Hydra Finder five foot (5')
location flag.
C.
Valves
Six inch to twelve inch valves shall be resilient seated gate valves, larger than
twelve inches shall be butterfly. Tapping tees shall have resilient seated gate
valves. All valves shall be for buried service.
C.1 Butterflv Valves: Butterfly valves shall be manufactured in the United
States, and shall conform to the requirements of A WW A C504 and the
following requirements:
a. Working pressure rating of 150 psi minimum.
b. Two inch square operating nut opening counterclockwise (left).
c. Double "0" ring or split V type stem seal.
d. Traveling nut type operator permanently sealed"and htbricated.
e. Manufacturers: Dresser, Pratt, or equal.
3 - 4
7-l5000m
'--:
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
.{
D.2
Appurtenances:
a. Corporation Stop: For use with flared copper service pipe, and the
inlet threaded with the standard A WW A taper thread.
b. Curb Stop: For use with flared copper service pipe both ends,
inverted key, and Minneapolis pattern.
c. Curb Box: Minneapolis pattern base, 78"-81" stationary rod, 12
inch box adjustment from 7' to 8', lid with pentagon plug, and
1-1/4" I.D. upper section.
d. Service Saddle: Double strap bronze stainless steel type. Service
saddle shall be Cascade Style CSC-2, Smith-Blair nylon coated
Style 317372, Ford Style FS 303, or approved equal.
e. Wrenches and Keys: The Contractor shall provide the Owner with
one 3' curb box shutoff rod and pentagon key for every 20 curb
boxes supplied or portion thereof, minimum of 3. Cost of keys
shall be incidental to the project.
f. Manufacturers:
Service Manufacturer's Number
Appurtenance Diameter Mueller McDonald Ford
Corporation Stop 1" - 2" H-15000 4701 F-600
Curb Stop 1" - 2" Mark II Oriseal 6104 B22-333M-3/4"
H-15154 B22-444M-l "
B22-&56M-l-1/2 "
B22-777M-2"
Curb Box 1" . H-10300 5614
1-112" - 2" H -1 0300/H 1 0344 5615
Shutoff Rod H-10321 305
Pentagon Key H -10325 304K
S:J.ddle
DIP H 16123 16137 2 0" B
PVC C900 H 13120 13135 3301 590
SPEC-745.000
3 - 6
745000m
q
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
H.2 Granular Material Use Designation: Granular materials provided for Foundation,
Bedding, Encasement, or Backfill use as required by the Contract, either as part
of the pipe item work unit or as a BID 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 replacement for
unsuitable or unstable soils, to achieve better foundation
support.
Granular Bedding Placed below the pipe midpoint, prior to pipe installation,
to facilitate proper shaping and achieve uniform pipe
support.
Granular Encasement Placed from pipe midpoint to one foot above the top of
pipe, after pipe installation, for protection of the pipe and
to assure proper filling of voids and thorough
consolidation of backfill.
Granular Backfill Placed below sub grade , if 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
construction and other conditions. The material use and zone designations
described above shall not be construed to restrict the use of any particular material
in other zones where the gradation requirements are met.
1. Insulation
Main insulation shall be extruded rigid board material having a maximum thermal
conductivity of 0.23 BTU/hour/square foot/degree Fahrenheit/per inch thickness, at 400F
mean, a compressive strength of 35 psi minimum, and water absorption of 0.25 percent
by volume maximum. Insulation shall be DOW Styrofoam HI-40, Minnesota Diversified
Products Certiforam brand insulation or equal. .
Unless otherwise specified in the Plans, Specifications, and Specific Requirements, board
dimensions shall measure 8 feet long, 4 feet wide, and 1-1/2 inches thick or greater.
3 - 8
SPEC-745.000
745000m
If
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
During construction, the Contractor shall maintain the streets and control dust as
directed by the Engineer. Dust control shall be provided in the same manner to
stockpiles of topsoil, dirt, or other materials throughout the period of construction.
Payment for maintaining streets and controlling dust shall be incidental to this
project and no separate payment made unless provided for on the BID.
B.
W ork Limits
The Owner has obtained permanent and temporary easements for all construction
on private property, as shown on the plan sheets.
The remaining construction is within the right-of-way of dedicated streets. The
. Contractor shall limit his operations to the street right-of-way or easement unless
he makes a separate arrangement with the landowner for the use of additional land.
B.l Work on Existing Right-of-Ways: In the case of construction on a railroad,
state or county highway right-of-way, a pennit for such construction will
be obtained by the Owner. The Contractor shall comply with all
requirements specified by the permit with respect to limits, safety
precautions, method of construction, etc., and shall furnish to the state or
county highway department or the railroad the required supplemental bonds
or insurance coverage's. as stipulated in the permits without additional cost
to the Owner.
c.
Establishing Line and Grade
The primary line and grade will be established by the Engineer. Line and grade
stakes will be set parallel to the proposed pipeline at an appropriate offset and
interval as will serve the Contractor's operations wherever practical; at each
change in line or grade; and as needed for pipeline appurtenances and service lines.
The Contractor shall arrange his 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 to accomplish the staking. The
Contractor shall be responsible for preservation of the primary stakes and shall
bear the full cost of any res taking necessitated by his negligence.
1'he Contractor shall be solely responsible for the correct transfer of the primary
line and grade from the stakes to all working points and for ctmst~tion of the
work to the prescribed lines and grades.
Unless otherwise specified in the Plans, Specifications, and Specific Requirements,
all water main shall generally be placed with 7-112 feet of cover. However, a
greater depth may be required to clear storm and sanitary sewers and sewer
services, and no additional compensation shall be provided for such adjustments.
3 - 10
7450CXJm
13
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
D.
Protection of Surface Structures
All surface structures and features located outside the excavation limits for
underground installations, 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 unless separate compensation is specifically
provided for in the Contract.
Obstructions such as street signs, mailboxes, guard posts, culverts, and other items
of prefabricated construction may be temporarily removed during construction
provided essential service is maintained in a relocated setting as approved by the
Engineer and 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 by and at the sole expense of the Contractor.
In the event of damage to any surface improvements, either privately or publicly
owned, the Contractor will be required to replace or repair the damaged property
to the satisfaction of the Engineerand by the Contractor at his expense.
E.
Interference of Under~round Structures
When any underground structure interferes with the planned placement of pipe or
appurtenances and requires alterations in the work 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 structures.
When any existing facilities are endangered by the Contractor's operations, he shall
cease his operations 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 utility owner, 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 to existing
facilities will be allowed only when that service will not be curtailed unavoidably
and then only when the encroachment or relocation will satisfy all applicable
regulations and conditions.
3 - 12
745(0)m
;s
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
.;
SPEC-74S.cXXJ
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 where
boring and jacking or tunnel construction methods shall be employed as specifically
required by the Plans or approved by the Engineer. Surface structures must be
properly supported and the backfill restored to the satisfaction of the Engineer.
The excavation operations shall be conducted to carefully expose all inplace
underground structures without damage. Wherever the excavation extends under
or approaches 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 telephone cables.
G.1 Classification and Disposition of Materials: All materials encountered in
the excavations, with the exception of items classified for payment as
structure removals, will be considered as Unclassified Excavation.
Unclassified materials shall include muck, rubble, wood debris, boulder
stone, masonry or concrete fragments less than one (1) cubic yard in
volume, together with other miscellaneous matter that can be removed
effectively with power operated excavators.
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
practical, 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.
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 nuisance or 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 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.
3 - 14
745000m
/1
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I.
I
/
SPEC-745.000
GA
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 by the Contractor
at his expense and without delay.
Where conditions warrant extreme care, the Contractor shall exercise
special precautions to protect life or property. This may include the
installation of sheet piling of the interlocking type or shall include other
safety measures be taken as the Contractor deems necessary. The
Contractor shall at all times be responsible for protection of life, property,
and the work on the project.
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 adequate protection of the inplace structures
and prevent displacement of supported grounds. Sheeting and bracing shall
be left in place only as required by the Contract. 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 (3) feet or more below the
established surface grade or 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 wriuen order of the Engineer, payment may
be made for those materials as an extra work item, including waste material
resulting from upper cut-off requirements.
Preparation and Maintenance of Foundations: Foundation preparations
shall be conducted to produce a stable foundation and provide continuous
and uniform pipe bearing between bell holes. Where Class C bedding is
specified, the initial excavating or backfilling operations shall produce a
sub grade level slightly above finished grade to permit hand shaping to
finished grade by trimming of high spots and without the need for filling
of low spots to grade.
3 - 16
745000m
11
I)
I'
I
I
1
I
I
1
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
H.
Installation of Pipe and Fittings
Inspection, handling, and all aspects of the installation of pipe, services, and
appurtenances shall be in accordance with the applicable sections of the A WW A
specifications, the manufacturer's recommendations, and as supplemented as
follows.
H.l Inspection and Handling: Proper and adequate implements, tools, and
facilities shall be provided and used by the Contractor for the safe and
convenient prosecution of the work. Unloading, distribution, and storage
of pipe and appurtenant materials on the job site shall be at a location
approved by the Engineer. All materials shall be handled carefully, as will
prevent damage to protective coatings, linings, and joint fittings; preclude
contamination of interior areas; and to avoid jolting contact, dropping or
dumping.
Before being lowered into laying position, the Contractor shall make a
thorough visual inspection of each pipe section and appurtenant units to
detect damage or unsound conditions that may need corrective action or be
cause for rejection. Inspection procedure shall be as approved by the
Engineer, with special methods being required as he deems necessary to
check out suspected. defects more definitely. The Contractor shall infonn
the Engineerofany defects discovered and the Engineer will prescribe the
required corrective action 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 repairs as needed.
H.2 Pipe Laving Operations: Trench excavation and bedding preparations shall
proceed ahead of pipe placement as will pennit 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 &eWer
watermain materials shall be carefully lowered into layfng pOiition by the
use of suitable restraining devices. Under no circumstances shall the pipe
be dropped into the trench.
3 - 18
7-l5000m
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
H.4
H.5
assembly to insure full insertion. Field cut pipe shall be filled or
ground at the spigot edge to resemble the manufacturer's fabricated
detailing. The use of the bucket on the excavation equipment shall
not be used to force pipe into socket.
H.3.b 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 cast iron gland shall then be slipped on the spigot end
with the lip extension toward the socket or bell end. The rubber
gasket 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 in
accordance with AWWA C-600 by means of a suitable
torque-limiting wrench within a foot-pound range of:
Pipe Size Bolt Size Torque
Inch InQl ft-Ib
3 5/8 45-60
4-24 3,4 75-90
30-36 1 100-120
After tightening, all exposed parts of the bolts and nuts shall be
completely coated with an approved bituminous rust preventive coal
tar material such as Koppers, Bitumastic Super Service Black or
Tnemec 46-457 Tnemecol.
Polvvinvl Chloride Pipe Joints: Jointing shall be in accordance with
AWWA Manual No. M23.
Aligning and Fitting of Pipe: The cutting of pipe for inserting valves,
finings, or closure pieces shall be done in a neat and wo.rkmanlike manner
without damage to the pipe and shall leave a smooth square-cut end. Pipe
shall be cut with approved mechanical cutters.
3 - 20
7-l5000m
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
deflection, and all caps, plugs, branch tees, crosses, valves at the
end of a line, all hydrant valves, and all hydrants. Restrained joints
cast onto the pipe by the manufacturer (Lok-Tyton, Fastite, etc.)
will be considered as being equivalent to the use of retainer glands.
Retainer glands equivalent in function and form to the Megalug
Series 1100 for ductile iron watermain or Megalug Series 2000PV
for PVC watermain may be used only if it is approved by the Joint
Powers Water Board Engineer.
Plugged tees and crosses in a straight run do not require restraint.
For restrained joints, the number of feet of tied pipe required shall
be in accordance with the table below.
FEET OF RESTRAINED OR TIED PIPE REQUIRED ON EACH SIDE OF THE BEND
NOTE: (1) Table based on sand excavation, for silt increase 50%
(2) If Polyethylene wrapping is used increase value by 100%
N.R. = Not Recommended
4' Cover 6' Cover 8' Cover
Pipe Size Bend Sizes Bend Sizes Bend Sizes
22 Y2 0 450 67V20 900 22 11z 0 450 67V20 900 22 Y2 0 450 67V20 900
3" N.R. N.R. N.R. N.R. 1 ' 3' 4' 8' 1 ' 2' 3' 4'
4" N.R. N.R. N.R. N.R. 2' 4' 5' 8' 1 ' 3' 4' 5'
6" N.R. N.R. N.R. N.R. 3' 6' 8' 9' 2' 4' 5' 6'
8" N.R. N.R. N.R. N.R. 4' 7' 9' 11' 3' 5' 7' 9'
12" N.R. N.R. N.R. N.R. 6' 10' 14' 17' 5' 8' 10' 12'
16" N.R. N.R. N.R. N.R. 7' 13' 18' 21' 6' 10' 14' 17'
20" 12' 22' 30' 37' 9' 15' 22' 27' 7' 12' 17' 20'
24" 14' 25' 37' 43' 10' 18' 26' 30' N.R. N.R. N.R. N.R.
30" 17' 30' 45' 52' 12' 21 ' 30' 37' N.R. N.R. N.R. N.R.
36" 19' 35' 50' 61 ' 14' 25' 35' 43' N.R. N.R. N.R. N.R.
42" 22' 39' 56' 69' 16' 28' 40' 49' N.R. N.R. N.R. N.R.
48" 24' 43' 63' 77' 18' 31 ' 45' 55' N.R. N.R. N.R. N.R.
Table is from "Standards For The Installation Of Water Mains" St. Paul Water Utility.
b. Offset bends made with standard offset fittings need not be strapped
or buttressed.
c. Tie rods and tie harnesses shall be of the same size as the required
bolt, torqued to the requirements of Section H.3.b. After installing
the tie rods and harnesses and prior to the backfill operations, they
shall be coated with a brush- applied tar coating. T,his coating
shall be Koppers Bitumastic Super Services Black or Tnemec
46-457 Tnemecol, or equal, and shall be applied to the
manufacturer's specifications. Hot dipped galvanized parts need
not be tar coated.
SPEC-745.000
3 - 22
745000m
zC;
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
jacking pipe. Bentonite grout under pressure shall be forced through this pipe at
all times during the jacking operation to fill any voids that might develop above the
casing.
The water pipe shall then be installed in the casing and the annular space between
the water pipe and casing shall be densely filled with sand and the ends sealed with
concrete or mortar.
The Contractor shall be responsible for obtaining or paying any special permit fees
for bonds, etc. required.
K.
Placement of Insulation
Rigid insulation board shall be placed within the pipe encasement zone, six (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 Specific Requirements-, then leveled and lightly
scarified to a depth of 1h inch. Encasement zone material placed below the
insulation shall be free of rock or stone fragments measuring 1-1/2 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 caution 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. Broken or damaged material shall be removed and replaced.
The first layer of material placed over the insulation shall be twelve (12) inches in
depth, free of rock or stone fragments measuring_1-1I2 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 sl'ecifief:i.
3 - 24
745000m
Z7
SPEC-745.000
3 - 26
745000m
I,
'.>
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
Connection of tap service lines to the water main shall be made with an
approved corporation stop, with the water main tap being made from
horizontal to an angle of not more than 15 degrees from the horizontal.
(2:30 and 9:~30 o'clock). Expansion loops shall be directed horizontally,
not vertically from the tap. A minimum of 3 full threads of the corporation
stop must engage in ductile iron water main or a saddle must be used for
the connection (see chart below). All tap service lines to polyvinyl chloride
water main shall have a saddle used with the connection.
DUCTILE-IRON PIPE SADDLE REQUIREMENTS
Class 52 Class 50
Pipe Size 4 6 8 10 12 14 16 18 20 24
Inches
Wall
Thickness .29 .31 .33 .35 .31 .33 .34 .35 .36 .38
Inches
Corp. Stop Pipe Thickness Required for 3 Corporation Stop Threads
Inches Inches
1 .38 .34 .32 .31 .30 .29 .29 .28 .28 .27
1-1/4 .45 .39 .36 .34 .33 .32 .31 .30 .30 .30
1-112 .44 .40 .37 .35 .34 .33 .32 .32 .31
2 .48 .44 .41 .39 .37 .36 .35 .33
ABOVE LINE-W/O SADDLE
BELOW LINE-W/SADDLE
The flaring of copper tubing ends shall be accomplished only with the use
of the proper size and type of tools as designated for the purpose, and 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.
I
I'
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
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 landscaped areas. In streets,
valve boxes shall be set at 1h inch below the finished surface of bituminous or
concrete pavement or 6 inches below the surface of a gravel surfaced road. Valves
-insta.lled belay; graund'.va.tcr shall have 6 mil polyethylene, 4' x 4', placed tightly
over the valve prior to the box assembly to prevent corrosion and soil migration
into the valve box assembly. Valve boxes shall not be installed so as to transmit
shock or stress to the valve. Valve boxes installed outside the paved roadway shall
have a 4"x4"x6' wood post installed, adjacentto the box, with two (2) feet above
the ground surface. Post is not required when the valve box is installed with a
hydrant. :Afi;t All valves pla.ced dccpcr thJn 8 fcct belo'N finishcd ;ra.dc shall
incorporate a valve stem extension that places the operating nut at 1. 6 to ~ 12
inches below finished grade.
Special appurtenances shall be provided and installed as required by the Plans and
Special Provisions.
All dead ends shall be closed with approved plugs or caps and restrained by
rodding or thrust blocking. If line size is reduced at the end of the line, restraints
shall be sized for the line size prior to reduction. Install a 4"x4" wood post
vertically from the pipe end invert to two (2) feet above the ground surface.
N.
PipeIine.'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. 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.
Backfilling shall be accomplished with the use of Suitable Materials selected from
the excavated materials to the extent available and practical.
Suitable Material shall be defined as a mineral soil reasonably free of foreign
materials (rubbish, debris, etc.), frozen clumps, organic matter, stone, rock,
concrete, or bituminous chunks larger than 4", and other unsuitable materials that
may damage the pipe installation or prevent thorough comp<fCtion,.taking into
consideration particular needs of different backfill zones. Unsuitable material shall
only be utilized where and to the extent there will be no detrimental effects and
with the approval of the Engineer.
3 - 28
745000m
3/
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
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 shall be
inspected prior to restoration.
P. Maintenance and Final Cleanup
All sub grade surfaces shall be maintained acceptably until the start of surface
construction or restoration work. Additional materials shall be provided and
placed as needed to compensate for trench settlement and to serve until completion
of the final surface improvements.
Final disposal of debris, waste materials, and other remains or consequences of
construction, shall be accomplished prior to final acceptance of all work. Final
acceptance of each BID item can only be made when the cleanup associated with
each item is completed. 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.
4. TESTING
A. Disinfection of Water Mains
Before being placed in service, the completed 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. The disinfection materials and procedures and the
collection and testing of water samples shall at a minimum be in accordance with
the provisions of A WW A C651, Disinfecting Water Mains, and as will meet the
requirements of the Minnesota Department of Health.
Where an existing water main is cut for the installation of a hydrant, for lowering
the water main, or for reasons detennined 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.
3 - 30
745000m
SPEC-745.000
"3:3
I,
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
A.2
Number of 5-g Hypochlorite Tablets
Required for Dose of 25 mg/l
Pipe Length of Pipe. feet
Diameter
(Inch) 13 or less 18 20 M2 ~
4 1 1 1 1 1
6 1 1 1 2 2
8 1 2 2 3 4
10 2 3 3 4 5
12 3 4 4 6 7
16 4 6 7 10 13
Number of 5-gtablets = .0012 d2L
d = pipe diameter, inches
L = pipe length, feet
Based on 3.25 grams (65%) available chlorine per tablet
The main shalL be filled with water at a rate no greater than 1 fps.
Precautions. shall be '. taken to assure that air pockets are eliminated. The use
of additional curb stops to bleed air through at high points may be
necessary.
Chlorination Residual of 25 mg/L chlorinated water shall be retained in the
pipe for a minimum of 24 hours, 48 hours when the water temperature is
below 410F. Valves and hydrants shall be operated to ensure disinfection.
Continuous Feed Method
Continuous feed method consists of completely filling the main, removing
all air pockets, flushing to remove particulates, then filling the main with
potable water chlorinated so that after a 24 hour holding period in the main
there will be a free chlorine residual of not less than 10 mg/L. Flushing
velocity shall not be less than 2.5 fps, see table below.
3 - 32
745OC{Jm
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
Strong chlorine solution in the main being treated shall not flow into mains
in service. The chlorinated water shall be re.tained in the main for at least
24 hours, during which time all valves and hydrants shall be operated in
order to disinfect the appurtenances. At the end of the 24 hour period the
treated water in all portions of the main shall have a residual of not less
than 10 mg/L free chlorine.
Preferred equipment for applying liquid chlorine is a solution feed vacuum
operated chlorinator in combination with a booster pump for injecting the
chlorine gas solution water into the main to be disinfected.
A.3 Flushing
After the applicable retention period, heavily chlorinated water shall not
remain in prolonged contact with the pipe. Chlorinated water shall be
flushed from the main until chlorine concentration is no higher than
generally in the system-for domestic use.
The environment to which the chlorinated water is to be discharged shall
be inspected. The Contractor shall be responsible to ensure that the
receiving area is not damaged by the chlorinated water and shall use a
reducing. agent for neutralization when necessary.
A.4 Bacteriological Tests
After fInal flushing and before the water main is placed in service, samples
of water shall be collected from the end of the main and each branch line
for testing for bacteriological quality in accordance with Standard Methods
for the Examination of Water and Wastewater, and. shall show the absence
of coliform organisms. Samples shall be at a rate of one per every 1000
feet of pipe. If water in the pipe does not meet the Minnesota Department
of Health requirements, disinfection procedure shall be repeated until
meeting the requirements. Acceptance forms from the governing agency
shall be furnished to the Engineer.
B.
Hydrostatic Testing of Water Mains
Each valved section shall be subjected to the pressure test and, if required, the
leakage test prescribed herein. Testing for the two (2) hour duration ~all be with
hydrants closed, and valves on hydrant leads and dead end water lines open. Once
this portion of the test is completed, the valve on the hydrant leads and dead end
water lines shall be closed and hydrants opened. The specified test pressure shall
be applied, and the test repeated for 15 minutes to establish the condition of the
hydrant lead valves.
3 - 34
7-l5000m
,37
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
SPEC-745.000
B.2
Leakage Test: After an unsatisfactory pressure test, and if authorized in
writing by the Engineer a leakage test shall be perfonned on each valved
section of water main 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. The water added shall be recorded to the nearest
fluid ounce.
After filling the pipe with water and expelling all air in the line, a pressure
of 150 psi 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 two (2) hours.
Each pipe section tested will be accepted if the leakage does not exceed the
quantity determined by the formula as shown in the table below, based on
an allowable leakage of 11.65 gpd/mile/nominal diameter inch at 150 psi.
L = SD-vP
133,200
L = Maximum pennissible leakage in gallons per hour
S = Length of pipe tested
D = Nominal diarneterof pipein inches
P = Average test pressure during the test, in pounds per square inch,
gauge pressure.
ALLOW ABLE LEAKAGE PER 1000 FEET OF PIPE
GALLONS PER HOUR
Avg.Test
Pressure Nominal Pipe Diameter - in.
12SJ :1: Q E li2 12 14 1Q 1B 20 24
200 0.43 0.64 0.85 1.06 1.28 1.48 1.70 1.91 2.12 2.55
175 0.40 0.59 0.80 0.99 1.19 1.39 1.59 1.79 1.98 2.38
150 0.37 0.55 0.74 0.92 1.10 1.29 1.47 1.66 1.84 2.21
125 0.34 0.50 0.67 0.84 1.01 1.18 1.34 1.51 1.68 2.01
100 0.30 0.45 0.60 0.75 0.90 1.05 1.20 1.35 1.50 1.80
70 0.25 0.38 0.50 0.63 0.75 0.88 1.00 1.13 1.26 1.51
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.
3 - 36
74S0C<Jm
I
I-
I
I
I
I
I
I.
'.
I
I
I
I
I
I
I
I
I
I
I
D. 1race Wire Test - PVC Watermain
The Contractor shall perform a conductivity test on all trace wire prior to
acceptance o(the watermain system. A low voltage circuit shall be completed with
the use of a suitable voltage source and meter to ensure continuity of the trace
wire.
In the event that a closed clamp circuit cannot be completed, 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.
E. 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.
s. METHOD OF MEASUREl\1ENT
A. Watermain
Watermain of each type and diameter shall be measured separately in linear feet.
Measurements shall be made along the pipe centerline without deductions in length
for fittings, valves. and other specials. Lengths of branches shall be measured from
the centers of connecting pipes to centers of valves or fittings. In the case of
hydrant leads, the compensation length shall be from the center of the connecting
main to the center of the valve. All length shall be measured in a horizontal plane
unless the grade of the pipe exceeds fifteen percent.
B. Valves
Valves of each kind and size shall be measured separately as complete units
including the valve box setting.
C. Hvdrant With Valve
Hydrant with valve shall be measured on a per unit basis. The unit includes
hydrant, 6" valve and valve box, 6" pipe between valve and hydrant, crushed rock,
and blocking or restraining devices and hydrant flag_
SPEC-7-l5.000
3 - 38
745000m
4)
I I
I Tees
(all MJ) ~ X6 X8 XlD .xu lill: X1Q ill X2Q X21
I 6" 115 125
8" 165 175 185
10" 235 250 260 310
I 12" 315 325 340 390 410
14" 435 450 465 540 585
I 16" 540 550 570 590 710 740
18" 590 605 620 640 755 905 945
20" 725 735 755 775 795 945 1140 1185
I 24" 985 1000 1020 1030 1055 1075 1400 1720 1815
I Crosses
(all MJ) ~ X6 X8 X1..Q .xu lill: X1Q Jill XW X24
I 6" 140 160
8" 189 205 235
I 10" 260 285 310 380
12" 340 360 385 460 495
14" 475 500 540 630 710
I 16" 575 605 645 685 830 895
18" 625. 655 685 725 870 1060 1130
20" 760 790 820 860 905 1085 1330 1415
I 24" 1025 1045 1085 1110 1155 1200 1590 1965 2155
I E. Granular Material
I Granular material used as specified shall be measured on a per ton basis. Weight
slips shall be required.
I F. Boring
Borings shall be measured in linear feet as specified on the plans or approved by
I the Engineer. The water main carrier pipe shall be measured under the water main
item.
I G. Water Service Connection
I Water service connections shall be measured on a unit basis for each size and type.
The connection shall include the corporation stop, tapping saddle where required,
curb stop, and curb box.
I SPEC-745.000 3 - 40 745COOm
I 13
I,
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
l
1.
J.
SPEC-745.000
E.
Granular Material
Granular material shall be paid for at the contract unit price per ton. based on
weight tickets collected at the project site. The price shall include all costs for
delivery, placement and compaction.
F.
Boring
Borings shall be paid for at the contract unit price per linear foot of boring for each
type and size of casing pipe specified. The payment per linear foot shall include
the payment for furnishing and installing the casing pipe. The water main carrier
pipe shall be paid for under the appropriate bid item.
G.
Water Service Connection
Water service connection shall be paid for at the contract unit price per each type
and size including corporation stop, curb stop, curb box and tapping saddle where
required.
H.
Service Lines
ServiceJinesshalLbepaid for at the contract unit price per linear foot for each type
and size of service line installed.
Insulation
Insulation shall be paid for at the contract unit price per square foot.
Raise Valve Box
Raising valve boxes shall be paid for at the contract unit price per each. Payment
shall be compensation for all materials, equipment, and labor to raise the valve box
to final grade for the final lift of bituminous paving.
END OF CHAPTER 3
.oJ;.
3 - 42
745000m