1994-08-10 Infiltration/Inflow Problem
MEYER-ROHLIN, INC.
ENGINEERS -LAND SURVEYORS 1111 Hwy. 25 N., Buttalo, Minn. 55313 Phone 612 - 682-1781
August 10, 1994
City of Albertville
c/o Linda Houghton, Clerk
PO Box 131
Albertville, MN 55301
RE: Parkside
Albertville, MN
Honorable Mayor and City Council Members:
As the Council members are aware, the Parks ide development experienced
an infiltration/inflow (1&1) problem in two manholes from February 19th
to February 24th of this year. Latour Construction, Inc., the contractor
doing the sanitary sewer construction for Kenco, questioned the City of
Albertville I s determination that 800,000 gallons of 1&1 went to the
wastewater facility. In reviewing the flow data, the City did make an
error in how much 1&1 should be charged to Kenco. The 800,000 gallons
was determined from the flow measurements made at the wastewater
facility and includes all 1&1 from the entire city and not just that
corning from parkside.
I therefore evaluated the flows at the Westwind lift station near
Savi tski I s to determine the 1&1 attributable to Parks ide . Since the
sani tary sewer in the Westwind area is so new, all 1&1 should be
directly attributable to the two manholes where 1&1 was clearly
identified. My analysis indicated an 1&1 of 520,500 gallons. See the
attached sheet. At $2.31/1000 gallons, the fee charged should be
$1202.36. Kenco is responsible to see that the City is reimbursed this
fee; however, it should be noted that Latour Construction is ultimately
responsible for the 1&1 which occured.
This letter is being forwarded to Latour Construction as a request for
payment. If you should have any questions, please feel free to contact
me.
Sincerely,
MEYE -ROHLI~
Norman Gartner
Professional Engineer
cc: File S-93124
Kenco Construction, Inc.
Latour Construction, Inc.
Mr. Paul Meyer, Johnson Larson Peterson & Meyer
Mr. Ken Lindsay, City of Albertville
Thore P. Meyer, Professional Engineer Robert Rohlin, Licensed Land Surveyor
PARKS IDE I & I
Flow to Flow at
Date WWTP (GPD) Westwind Lift Station (GPD)
02/12/94 116,000 )
02/13/94 112,000 )
02/14/94 110,000 67,200 )
02/15/94 118,000 )
02/16/94 136,000 46,200 ) 22,800 GPD Avg.
02/17/94 117,000 )
02/18/94 118,000 46,200 )
02/19/94 213,000 66,150 )
02/20/94 386,000 233,100 )
02/21/94 220,000 86,100 )
02/22/94 225,000 133,350 ) 657,300 gal.
02/23/94 265,000 67,200 )
02/24/94 200,000 71,400 )
02/25/94 116,000 21,000 )
02/26/94 115,000 )
02/27/94 136,000 ) 22,050 GPD Avg.
02/28/94 123,000 66,150 )
Average flow 2/12/94 to 2/18/94 = 22,800 gallons/day.
1&1 Flow = 657,300 gallons (2/19/94 to 2/24/94)
-6 days x 22,800 gallons/day
520,500 gallons
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Addendum No. 3
To
Plans and Specifications
For
1988-3A Improvement Project
For
Albertville, Minnesota
Date of Original Plans & Specs
April 25, 1988
Date of Addendum No. 3
May 10, 1988
Meyer-Rohlin, Inc.
Engineering & Land Surveyors
1111 Highway 25 North
Buffalo, MN 55313
E-8801-A,D,F
1. Plan Sheet 17, Details 4.010 and 4.016.
These details are hereby deleted and those shown on
4.028, which is part of this addendum, are
substituted in their place. B-6-18 curb and gutter
shall be placed adjacent to all catchbasins.
Surmountable curb and gutter shall be placed on the
remainder of the project.
2.
Three phase power is not available at this time. .\ J
Single phase 120/240 Volt service will be pro- ..\OOfJ ,'1
vided. The contractor shall wire the station for Ir:.A At
the eventual change-over to three phase power. TheL~'Al'4~1"
pumps and operating conditions are revised JA' ~1r-,,..
follows: ~~i1 p tI
~r"
Minimum
Discharge
4 inches
RPM
1730
36'
Model
Impeller
CP-3102-436
Minimum
Shutoff
65'
Motor
HP
4.0
Maximum
Input KW
4.1
Voltage
120/240
single phase
All bidders shall acknowledge the receipt of Addendum No. 3
in their proposal.
End of Addendum No. 3