1g. Lift Station No. 3 Modifications Project: Approve Plans & Specs & Auth Ad for Bids
CITY OF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen, MN 55317
Administration
Phone: 952.227.1100
Fax: 952.227.1110
Building Inspections
Phone: 952.227.1180
Fax: 952.227.1190
Engineering
Phone: 952.227.1160
Fax: 952.227.1170
Finance
Phone: 952.227.1140
Fax: 952.227.1110
Park & Recreation
Phone: 952.227.1120
Fax: 952.227.1110
Recreation Center
2310 Coulter Boulevard
Phone: 952.227.1400
Fax: 952.227.1404
Planning &
Natural Resources
Phone: 952.227.1130
Fax: 952.227.1110
Public Works
1591 Park Road
Phone: 952.227.1300
Fax: 952.227.1310
Senior Center
Phone: 952.227.1125
Fax: 952.227.1110
Web Site
WNW.ci .chanhassen.mn. us
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MEMORANDUM
TO:
~~tJ<
Paul Oehme, City Engineer/Dir. of Public Works \\
Joseph Shaml., Project Enginee~ t>~
July 23, 2007
FROM:
DATE:-
SUBJECT: Lift Station No.3 Modifications Project No. 07-03:
Approve Plans and Specifications; Authorize Ad for Bids
REQUESTED ACTION
Approve the Plans and Specifications and Authorize Ad for Bids for Lift Station No.
3 Modifications Project No. 07-03.
DISCUSSION
On February 12,2007, Council authorized the preparation of the plans and
specifications for the Lift Station No.3 Modifications Project. Lift Station No.3 is
located on the north side of Trunk Highway 7 just west of Church Road. The station
was built in 1972 and is the main collection point for waste water in the western
portion of the city and picks up flows from several smaller lift stations. The flows to
Lift Station No.3 go directly into the Metropolitan Council sewer system. The
service area of Lift Station No.3 has grown substantially in resent years including a
large development just to the west of the station.
The station was identified as a problem after reviewing the run times of the pumps
after the new SCADA system was installed in 2005. A review of the pump run times
and hourly cycles for this station revealed the pumps are cycling at an exorbitant rate
which is indicative of insufficient wet well capacity for proper operation of the
pumps. There is less than one (1) foot of wet well capacity between the time the
pumps start and shut off. This means the pumps have less than one foot of working
range which limits the amount of time the pumps are actually running and increases
the number of times that the pumps start and stop. Sanitary sewer pumps are
constructed in such a manner that longer run times and less frequent stops and starts
per hour (cycles) provided for a longer service life for the pumps. High rate cycles
on an hourly basis result in increased wear and stress on the pumps and increased
levels of pump maintenance and replacement. The increased cycles of the pumps can
be attributed to additional flow from new developments in the area. The increased
cycling will only increase as the new developments are built out.
The lift station and the upstream service area for this lift station was identified as a
priority area in the "Sanitary Sewer Infiltration and Inflow Reduction Plan" for
inflow and infiltration (III) removal. As a result of the ill analysis, staff is concerned
with the operation of Lift Station No.3.
The City 01 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.
Lift Station No.3 Modifications
July 23, 2007
Page 2
PROJECT SUMMARY
The scope of the Lift Station No.3 project is as follows:
· A new wet well has been designed to provide adequate storage for ultimate build
out of the lift station area. Utility crews should have adequate time to service the
lift station in the event a major problem occurs.
· New pumps are included in the scope of work and are sized for ultimate flow of
the new head (pumping) conditions of the wet well.
· The power supply to this site is overhead and highly susceptible to power
outages. Due to the amount of flow to the station and the distance the lift station
is from the Public Works building, the lift station control panel will be designed
with the capabilities of a secondary power supply (standby generator). A standby
generator is proposed to be bid out separately from the lift station contract to
avoid contractor markups. The City has backup generators at other high volume
lift station sites such as Lift Station No. 10 by Lotus Lake.
· A new control panel will need to be purchased for the station. The panel is
proposed to be quoted out separately from the lift station contract to save
contractor markups.
The project was budgeted for in the 2007 CIP (SS-017) and would be funded through
the sanitary sewer utility fund.
The anticipated schedule for the project is as follows:
Bid Opening
Award Contract
Start Construction
Substantial Completion
August 16, 2007
August 27, 2007
September 12,2007
March, 2008
RECOMMENDA TION
Staff recommends that City Council approve the plans and specifications and order
advertisement for bids.
Attachments
c: Kelley Janes, Chanhassen Utility Superintendent
G:\ENG\PUBLIC\07-03 Lift Station No. 3\07-23-07 approve P&S order ad for bid.doc
Capital Improvement Program
City of Chanhassen, MN
2007 thru 2011
Project #
SS-017
Project Name Sanitary Lift Station Rehabilitation Program
Account # 1 701-0000-4751
Account # 3
Account #2
Contact Unassigned
Department Sanitary Sewer Improvements
Type Improvement
Useful Life Unassigned
Category Utilities
Priority nJa
Total Project Cost $475,000
Description
The sanitary lift station rehabilitation program is designed to minimize sewer backups and emergency calls due to failed lift station equipment The
City currently maintains 30 lift stations. Many of these lift stations are high service pumps and need frequent servicing. The program will service
or replace pumps, pipe gallery, and electrical components as needed. Lift Station #3 is recommended for improvements in 2007. Lift Station #3
located on the north side of Highway 7 takes all the flow from the properties on the west side of Lake Minnewashta and properties on the north side
of Highway 7. The wet well capacity has become undersized for flows. The electrical panel has become unreliable and needs to be replaced. The
electrical power in this area is unreliable, so a permanent backup generator is recommended.
Justification
Reduce emergency calls and potential sewer backups.
Expenditures
Maintenance
2007
265.000
Total 265,000
2008
50,000
50;000
2009
50,000
50,000
2010
55,000
55,000
Funding Sources
Sewer Utility Fund
2007
265,000
Total 265,000
2008
50,000
50,000
2009
50,000
50,000
2010
55,000
55,000
Operational Impact/Other
89
2011
55,000
55,000
Total
475,000
475,000
2011
55,000
55,000
Total
475,000
475,000
DATE:
CITY OF CHANHASSEN
CARVER AND HENNEPIN COUNTIES, MINNESOTA
RESOLUTION NO:
2007-
Julv 23. 2007
MOTION BY:
SECONDED BY:
A RESOLUTION APPROVING PLANS AND SPECIFICATIONS AND
AUTHORIZING AD FOR BIDS FOR THE LIFT STATION NO.3
MODIFICA TIONS PROJECT NO. 07-03
WHEREAS, pursuant to a resolution passed by the Council on February 12, 2007, the City
Engineer has prepared plans and specifications for the Lift Station No.3 Modifications Project No.
07 -03 and has presented such plans and specifications to the Council for approval;
NOW, THEREFORE, BE IT RESOLVED that the Chanhassen City Council:
1. Such plans and specifications, a copy of which can be reviewed at the office of the City
Engineer, are hereby approved.
2. The city clerk shall prepare and cause to be inserted in the official city newspaper and
Construction Bulletin, an advertisement for bids upon the making of such improvement under such
approved plans and specifications. The ad shall be published twice, shall specify the work to be
done, and shall state that bids will be opened and that the responsibility of the bidders will be
considered by the Council at 7:00 PM on Monday, August 27, 2007, in the Council Chambers of
the City Hall. Any bidder whose responsibility is questioned during consideration of the bid will be
given an opportunity to address the Council on the issue of responsibility. No bids will be
considered unless sealed and filed with the clerk and accompanied by a bid security payable to the
clerk for 5% of the amount of such bid.
Passed and adopted by the Chanhassen City Council this 23rd day of July, 2007.
ATTEST:
Todd Gerhardt, City Manager
Thomas A. Furlong, Mayor
YES
NO
ABSENT
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