1i. Well 3 Redevelopment: Approve CO 1
CITY OF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen, MN 55317
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Phone: 952.227.1100
Fax: 952.227.1110
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Senior Center
Phone: 952.227.1125
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Web Site
www.CLchanhassen.mn.us
.i~
MEMORANDUM
TO:
Todd Gerhardt, City Manager
Paul Oehme, Director of Public Works/City Engineer ~ ~
FROM:
DATE:
o~
April 28, 2008
SUBJ:
Well #3 - Redevelopment: Approve Change Order #1
REQUESTED ACTION (Simple Majority Vote Required)
Approve Change Order #1.
BACKGROUND
On March 24, 2008, the City Council approved a
redevelopment of Well #3.
Traut Wells for
DISCUSSION
This past summer's high irrigation usage put a
infrastructure. At Well #3, located on Galpin
with constant high water demand
sand from the aquifer becomes' displaced
When sand is drawn into the pump,
problems in the distribution system. The
significant enough that the well pump yield had
offset the problem.
Traut Wells pulled the pump and motor the
significantly more sand in the well then what was
was bid. Staff estimated the amount of sand
not have equipment to pull pumps and
The findings showed the open hole in the
filled in with the Jordan sand stone. This sand
sanding problem, increase the yield of the
on the pump. The original bid had
remove 50 cubic yards of sand. It is now
yards of sand needs to be removed from the well. The estimate for the
additional work using the unit prices from the bid is estimated to be $15,000.
Staff does not know what the final quantity of sand is that needs to be removed
because the work is not compl~t~d.'<~ta.~fisrequesting a change order, not to
The City ot Chanhassen · A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play.
Mr. Todd Gerhardt
April 28, 2008
Page 2
exceed amount, of $15,000 to complete this work. City staff plans to work with
the contractor to verify the amount of sand removed from the well on a daily
basis. Staff has reviewed the unit price from Traut Wells' bid for removing the
sand and found it to be the most competitive of the bids received for this project
and is lower than the bids received from the two new wells the City is currently
constructing.
Funding for the redevelopment of Well #3 was budgeted in the 2008 CIP
(W-032). Currently, the Council has approved $58,510 in expenditures from
this CIP item. These expenditures included the original contract for
redevelopment of well #3 and the rehabilitation work at Well #7. Staff is
requesting the change order amount of $15,000 be paid for through this same
CIP line item. Including the Change Order request, the anticipated fund
expenditures would be less than the amount budgeted.
RECOMMENDA TIONS
Staff recommends that the City Council approve Change Order #lin the amount
of $15,000.
Attachment
G:\ENGIPUBLICIPW092A Well No.3 Repairs (2008)\bkgd 42808 well 3 rehab chg order #1.doc
Capital Improvement Program
City of Chanhassen, MN
2008 thru 2012
Project #
W-032
Project Name Well Rehabilitation Program
Account # 1 700-0000-4530
Account # 3
Account #2
Contact Unassigned
Department Water System Improyements
Type Improvement
Useful Life Unassigned
Category Utilities
Priority n/a
Total Project Cost $255,000
Description I
This program annually inspects and performs regular maintenance of the City's wells. Well pumps are recommended to be serviced every 8 years.
In 2008, it is recommended that the pumps in wells #2 and #3 be lowered because of the drop in the aquifer levels.
Justification I
To extend the life and ensure reliability of the City's well fields. Performing regular maintenance will extend the life of well components, reduce
emergency calls and have a more reliable water supply system.
2012
45,000
45,000
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Expenditures
Maintenance
2008
80,000
80,000
2009
40,000
40,000
2010
45,000
45,000
2011
45,000
45,000
Total
Total
255,000
255,000
Funding Sources
Water Utility Fund
2008
80,000
80,000
2009
40,000
40,000
2010
45,000 ..
45,000
2011
45,000
45,000
Total
2012
45,000
45,000
Total
255,000
255,000
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