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<br />MS,~
<br />October 12, 1994
<br />CONS~'LmG ENGINEERS File: 235-010-20
<br />
<br />CIVil ENGINEERING.
<br />
<br />ENVIRONi'.1ENTAl
<br />
<br />,';1UNIC/PAl
<br />
<br />PLANNING
<br />
<br />STRUCTURAL
<br />
<br />.5URVEy,ING
<br />
<br />T.~ArFiC
<br />
<br />rrIANSPORiAilOi\'
<br />
<br />1326 Energy Pork Drive
<br />St. Paul, MN 55108
<br />612.64404389
<br />Fox: 612-644-9446
<br />
<br />. 9800 sh~ord Parkway
<br />Minneopoli" MN 55441
<br />
<br />612.546.0432
<br />Fox: 612.544-6398
<br />
<br />Mr. Bill Birrenkott
<br />General Manager
<br />Elk River Municipal Utilities
<br />322 King Avenue
<br />Elk River, MN 55330
<br />
<br />RE: GARY STREET WATER TOWER CONSTRUCTION BIDS
<br />
<br />Dear Mr. Birrenkott:
<br />
<br />We have tabulated the bids received on October 4, 1994, for the new 1,000,000 gallon water
<br />tower at the Gary Street site. The bids consisted of two options: Option A, a 1,000,000
<br />fluted column tank, and Option B, a 1,000,000 gallon pedestal spheroid tank. In addition,
<br />two alternates were bid relative to painting existing towers. Alternative #1 was to paint the
<br />exterior of the existing 100,000 gallon legged tower located at the Cretex plant. The second
<br />alternative was to paint the fluted column of the existing 1,000,000 gallon water tower
<br />located north of the School District office. There were a total of three bids received.
<br />Attached is a bid tabulation sheet summarizing these bids.
<br />
<br />We have recently completed the modeling of the existing water distribution system, including
<br />the new 1,000,000 gallon tower for the purposes of analyzing the need for an altitude valve
<br />at either the existing or the new 1,000,000 gallon water tower. The conclusion of this
<br />modeling indicates that the existing 100,000 gallon Cretex water tower will no longer
<br />significantly add to the City's water storage after the new tower comes on line. The existing
<br />Cretex tower currently has a poorly operating altitude valve and will cause the well pumps
<br />to shut off prior to the 1,000,000 gallon towers being filled. The amount of unused storage
<br />in the 1,000,000 gallon towers will be greater than the 100,000 gallon capacity of the Cretex
<br />tower. The model also indicated that by removing the Cretex tower from the system, the
<br />two 1,000,000 gallon towers would fill and would not justify the $70,000-$100,000 cost of
<br />altitude valves. Based on the outcome of this computer simulation, we would recommend
<br />that, once the new 1,000,000 gallon tower comes on line, this system be field tested to verify
<br />the projections of the computer model. If the projections prove to be accurate, the
<br />recommendation would be to eliminate the 100,000 gallon Cretex tower from the City's
<br />water system, since it will no longer add significantly to water storage capacity.
<br />
<br />Given the conclusion that the Cretex water tower does not significantly benefit the total
<br />storage volume of the City's water system, we do not recommend considering Alternative
<br />#1 for the painting of this tower at this time. Assuming an award of a 1,000,000 gallon
<br />tower with Alternate #2 for painting the fluted column of the existing 1,000,000 gallon
<br />tower, Pitt Des Moines, Inc., is the lowest bidder at $887,300. This bid would provide a
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