1d. Wells 12 and 13: Approve Plans and Specs
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
www.ci.chanhassen.mn.us
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MEMORANDUM
TO:
Todd Gerhardt, City Manager
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FROM:
Paul Oehme, Dir. Of Public Works/City Engineer
DATE:
December 10, 2007
SUBJ:
Wells 12 & 13, Project Nos. 08-04 & 08-05: Approve Plans &
Specifications; Authorize Ad for Bids
BACKGROUND
On October 22, 2007, Council authorized a consultant contract with Barr Engineering
Co. for the improvements to Well Nos. 12 and 13.
On November 13, 2007, staff held a neighborhood meeting for surrounding property
owners to learn about the project.
DISCUSSION
Proposed Wells 12 and 13 are intended to replace the production capacity that was
lost last summer when Wells 5 and 6 failed. When the project was authorized, six
potential well site alternatives were identified for the new well locations. Additional
well sites were considered preliminarily that were further away for the east water
treatment plant but these sites were ruled out at this time because of various reasons
including time constraints. Barr Engineering Co. developed constraints and . ria to
compare the six sites that included completing a ground water model to predi he
interference between the proposed wells and existing Wells 2 and 10 and cost
estimates for each of the viable sites. Alternatives 2 and 4 had the least amount of
well interference with the existing wells, have the greatest potential fo cess and
are the most cost effective locations when compared based on total well ld yield.
For this reason, Alternatives 2 and 4 are proposed to be the sites for the new wells.
Alternative 2 is proposed for Well 12 and Alternative 4 is proposed for Well 13.
Based on the modeling work completed, it is anticipated the two new wells will each
yield approximately 1,200 gpm.
On November 13,2007, a neighborhood meeting was held at CityHallforresid~nts
to learn about the projects and voice their concerns. Preliminary site layouts were
displayed as well as pictures of an existing well site so residents would have a general
idea of what the finished project would look like. Residents commented on the Well
12 site that they would like to see minimal new pavement added as part of the project
and they would like landscapingt6:15y:~nplua.ea. in the project to soften the view of the
site as seen from the northeast side of Lotus Lake. These comments have been
incorporated into the site design for Well 12.
The City of 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.
Todd Gerhardt
December 10,2007
Page 2
Well 12 is located near existing Lift Station No. 12. This lift station is scheduled for
rehabilitation in 2009. In anticipation of that project, the electrical transformer and
electrical cabinet installed for Well 12 will be sized accordingly to allow for it to be
used in the future for Lift Station No. 12. This will allow for one control panel and
one transformer at the site rather than two of each.
Well 13 received very few comments from residents. Comments from residents did
include reducing the amount of the impacts to the park, including saving as many
trees along Lake Drive as possible. The City currently does not own the 25' strip of
land along Lake Drive which includes the tree line. Staff is working with the owner
of this property to purchase the strip of property. The purchase of the property is
recommended to save on costs for installation of the raw watermain, have a better
hydraulic alignment of raw watermain, and to give the Parks Department better
access to the park. Staff hopes to have a purchase agreement for Council
consideration for this piece of property at the same time the award of construction
contract is considered by Council.
The construction of Wells 12 and 13 will be bid as one project. The watermain
required to connect the new wells to the water treatment plant will be bid as a
separate project. The project layout is completed and work is proceeding on plans
and specifications for both projects.
Funding for this project has been budgeted for in the 2008 Capital improvements
plan. The current project estimate for the well projects is $1,250,000, $640,000 for
Well 12 and $610,000 for Well 13. The current project estimate for the connecting
watermain is $560,000. Council should be aware that there is a significant amount of
uncertainty related to construction costs right now due to rapid price increases in
materials used in construction. The cost estimates above have contingencies to
address this but the current fluctuations in prices are very difficult to predict.
The anticipated schedule of the project is as follows:
Advertise for Bids
Bid Opening
A ward Contract
Start Construction
Substantial Completion
December 17, 2007
January 8, 2008
January 14, 2008
January 21,2008
May, 2008
RECOMMENDA TION
Staff recommends that City Council approve the plans and specifications and order
the ad for bids for City Project Nos. 08-04 and 08-05.
Attachments
g:\eng\publie\_2008 projeets\08-04 well no. 12\121007 app plans-spees.doe
Proposed Well 12
Lotus Lake Boat Landing
Example of electrical panel
Electrical panel and wellhead will be
screened by trees and shrubs
Example of wellhead
Electrical panel and wellhead will be
accessed via a bituminous driveway
.
mTOF
IlUJjP.IS\ll
- No new Muminous proposed
- Natural Rock Retaining Wall
Example of electrical transformer
From a short distance, the wellhead
and electrical panel will blend into the
scenery
Proposed Well 13
Chanhassen Estates Park
Example of electrical panel
Electrical panel and wellhead will be
screened by trees and shrubs
Example of wellhead
The park green space will be restored
after construction
.,.
IlTIOf
lll\IIlIl\'!IJ
Example of electrical transformer
From a short distance, the wellhead
and electrical panel will blend Into the
scenery
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Capital Improvement Program
City of Chanhassen, MN
2008 thnt 2012
Contact
Department Water System Improvements
Project #
W-047
Type Unassigned
Useful Life
Project Name Well #12 Improvements
Account # 1
Account #2
Account # 3
Category Utilities
Priority nfa
Total Project Cost $940,000
Description I
This well is proposed to replace the lost capacity of Well #5.
Justification ..1
To meet the peak summer irrigation demands of the city.
Expenditures
Construction
2008
940,000
940,000
2009
2010
2011
2012
Total
940,000
940,000
Total
Funding Sources
WciterUtility Fund
2008
940,000
940,000
2009
2010
2011
2012
Total
940,000
940,000
Total
Operational Impm:t/Other 1
Capital Improvement Program 2008 thru 2012
City of Chanhassen, MN
I Project # W -044
ProJcct Name Well #13
Account # 1 Account # 3
.. .... ........ ...~~.,.,.,.......,~\
Contact
Department Water System Improvements
Account #2
Type Unassigned
Useful Life
Catcgory Utilities
Priority nla
Description I
This well is proposed to replace the lost capacity of well #6.
Total Project Cost $1,200,000
Justification I
To meet the peak summer irrigation demands of the city.
.
Expenditures
Construction
2008
1,200,000
Total 1,200,000
2009
2010
2011
2012
Total
1,200,000
1,200,000
Funding Sources
Water Utility Fund
2008
1,200,000
Total 1,200,000
2009
2010
2011
2012
Total
1,200,000
1,200,000
Operational Impact/Other I