5.12.A. SR 10-17-1994
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ITEM 5.12.A.
MEMORANDUM
TO:
MAYOR & CITY COUNCIL
FROM: PAT KLAERS, CITY ADMINISTRATOR
DATE: OCTOBER 13, 1994 Qr
SUBJECT: GARY STREET WATER TOWER
CONSTRUCTION BID
The Utilities Commission unanimously approved the bid from Pitt-Des
Moines, Inc., for the Gary Street water tower project at its October 12, 1994,
meeting. The Commission accepted Alternative #2 and rejected Alternative
#1 as it is anticipated that this "Cretex" 100,000 gallon tower will be phased
out of service over the next few years. The fluted column tank that was
approved will be similar, if not identical, to the tower north of the School
District Administration building. One of the major factors in accepting this
bid was the storage space at the base of this water tower.
.
.
P.O. Box 490. 13065 Orono Parkway · Elk River, MN 55330 · (612) 441-7420 · Fax: (612) 441-7425
MS,~
October 12, 1994
CONS~'LmG ENGINEERS File: 235-010-20
CIVil ENGINEERING.
ENVIRONi'.1ENTAl
,';1UNIC/PAl
PLANNING
STRUCTURAL
.5URVEy,ING
T.~ArFiC
rrIANSPORiAilOi\'
1326 Energy Pork Drive
St. Paul, MN 55108
612.64404389
Fox: 612-644-9446
. 9800 sh~ord Parkway
Minneopoli" MN 55441
612.546.0432
Fox: 612.544-6398
Mr. Bill Birrenkott
General Manager
Elk River Municipal Utilities
322 King Avenue
Elk River, MN 55330
RE: GARY STREET WATER TOWER CONSTRUCTION BIDS
Dear Mr. Birrenkott:
We have tabulated the bids received on October 4, 1994, for the new 1,000,000 gallon water
tower at the Gary Street site. The bids consisted of two options: Option A, a 1,000,000
fluted column tank, and Option B, a 1,000,000 gallon pedestal spheroid tank. In addition,
two alternates were bid relative to painting existing towers. Alternative #1 was to paint the
exterior of the existing 100,000 gallon legged tower located at the Cretex plant. The second
alternative was to paint the fluted column of the existing 1,000,000 gallon water tower
located north of the School District office. There were a total of three bids received.
Attached is a bid tabulation sheet summarizing these bids.
We have recently completed the modeling of the existing water distribution system, including
the new 1,000,000 gallon tower for the purposes of analyzing the need for an altitude valve
at either the existing or the new 1,000,000 gallon water tower. The conclusion of this
modeling indicates that the existing 100,000 gallon Cretex water tower will no longer
significantly add to the City's water storage after the new tower comes on line. The existing
Cretex tower currently has a poorly operating altitude valve and will cause the well pumps
to shut off prior to the 1,000,000 gallon towers being filled. The amount of unused storage
in the 1,000,000 gallon towers will be greater than the 100,000 gallon capacity of the Cretex
tower. The model also indicated that by removing the Cretex tower from the system, the
two 1,000,000 gallon towers would fill and would not justify the $70,000-$100,000 cost of
altitude valves. Based on the outcome of this computer simulation, we would recommend
that, once the new 1,000,000 gallon tower comes on line, this system be field tested to verify
the projections of the computer model. If the projections prove to be accurate, the
recommendation would be to eliminate the 100,000 gallon Cretex tower from the City's
water system, since it will no longer add significantly to water storage capacity.
Given the conclusion that the Cretex water tower does not significantly benefit the total
storage volume of the City's water system, we do not recommend considering Alternative
#1 for the painting of this tower at this time. Assuming an award of a 1,000,000 gallon
tower with Alternate #2 for painting the fluted column of the existing 1,000,000 gallon
tower, Pitt Des Moines, Inc., is the lowest bidder at $887,300. This bid would provide a
.
Mr. Bill Birrenkott
October 12, 1994
Page Two
new 1,000,000 fluted column type of tank. If the Municipal Utilities desires to have a
pedestal type spheroid style tank, CBI Na-Con, Inc., would be the lowest and only bidder
with a combined bid of $903,500. This is $16,200 more than the fluted column bid of Pitt
Des Moines.
Both of these contractors have previously constructed towers in the City of Elk River. CBI
Na-Con has recently completed the 500,000 gallon pedestal tower in the Northeast Area,
while Pitt Des Moines constructed the 1,000,000 gallon tower located behind the School
District office.
We will be in attendance at your October 12 Utilities Commission meeting if you have any
questions regarding the bids.
Sincerely,
.
MSA, CONSULTING ENGINEERS
T~
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Paul E. Boettcher, P.E.
TJM:tw
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