1g Lake Lucy ReservoirCITYOF
)0 City Center Drive, PO Box 147
i Chanhassen, Minnesota 55317
Phone 612.93Z 1900
', General Fax 612.937.5739
. .
£ngineenng Fax 612.937.9152
t,,, lic Safety ?ax 612.934.2524
Web www. ci. cha,hasse,, mn. us
MEMORANDUM
TO: Mayor
City Council
FROM:
Teresa Burgess, Public Works Director/City Engine~
DATE: January 22, 2001
SUB J:
Approve Change Order for Lake Lucy Reservoir
Project No. 00-02
Staff recommends the approval of a change order in the amount of $14,200 for the
above-referenced project. The change order is for sludge removal and logos.
SLUDGE REMOVAL
Sludge forms at the bottom of water reservoirs. This sludge is made up of sand, rust, and
other suspended materials that settle out in the reservoir. No more than 4" were
anticipated based on similar tanks, however, depths varying from 24"-32" were
discovered when the tank was drained. The additional sludge was a result of the City ·
water's high rust content and the deferment of the maintenance until the Arboretum
Tower was in operation. (Tanks are usually painted every 7-10 years. This tank had
been in operation 12 years when the project was started.) The City's utility crew assisted
in the sludge removal which reduced the cost, however, the contractor has asked for
$4,420.00 to cover the additional work done by his crews.
LOGOS
The tower cun-ently has two maple leafs on it. The logos were not included in the bid for
the tower because of budget issues. Bids were significantly lower than anticipated and
adding the logos back into the project is recommended. The logos have been in place
during the 12-year life of the reservoir and have an aesthetic value. The contractor has
asked for $9,800.00 to add the logos to the contract.
TOTAL COST IMPACT
The original contract sum is $328,500. With the change order, the new contract sum is
$342,720. The revised contract is 32.7% less than the Engineer's Estimate of $508,900
and 15.7% less than the next low bid of $406,393 by Odland Protective Coatings.
(Neither the Engineer's Estimate nor the Odland bid include the sludge removal or
logos.)
Ob
c: Kelley Janes, Utilities Superintendent
g:\eng\public\00-02\lake lucy staffreport - 1-22.doc
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