1k. Well No. 14: Approve Consultant Contract
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
1~
MEMORANDUM
TO:
Todd Gerhardt, City Manager
FROM:
{),
Paul Oehme, Director of Public Works/City EngineerY'
DATE:
November 9,2009
()~
SUBJ:
Well No. 14 Project 10-03: Approve Consultant Contract for Design of Well
Improvement
PROPOSED MOTION
"The City Council approves a professional service contract with Barr Engineering
Company in the amount of$48,200 for engineering services for Well No. 14."
City Council approval requires a simple majority vote of the City Council present.
BACKGROUND
At the January 12,2009 Work session, staff discussed the Well No. 14 improvements along
with the Well No.4 water quality improvements.
DISCUSSION
Well No. 14 is recommended to be constructed to keep pace with peak summer water demand
of the community. Well No. 14 will be the 11th well for the City and is proposed to be a
Jordan aquifer production well. The water for this well will be treated at the East Water
Treatment Plant. The well would be located on north side of Lake Drive across from Lake
Susan Park. The well would use the proposed raw watermain that Well No.4 would use to
convey the water to the plant for treatment.
Staff is proposing this well for several reasons:
1. To address the failure of Well No. 11 to yield adequate water supply to the plant.
Well No. 11 is in the same drift aquifer as the failed2007 Well Nos. 5 and 6. Since
those failures, Well No. 11 has not preformed consistently as a production well. The
. well currently has only 20 feet of static water level cover which is not adequate to
keep air from vortexing into the pump causing a damaging condition known as
cavitation. It is not practical to lower the pump-set in this compromised aquifer.
2. If approved the addition of Well No. 14 will add approximately 1000 GPM of treated
water into the City's distribution system. During the peak summer months, untreated
water must be used to augment the treatment plant's production of finished water.
The addition of Well No. 14 will allow staff to maximize our treatment plant
investment, increasing treated water capacity from 6,100 GPM to 7,100 GPM. (6,100
GPM includes Well No.4 production).
Chanhassen is a Community f!lr Life - Providing for Today and Planning for Tomorrow
Paul Oehme
Well No. 14: Approve Consultant Contract
November 9, 2009
Page 2
3. The Jordan aquifer on which much of the Twin Cities metro relies on is experiencing
a downward trend in static levels. Chanhassen's Well No.2 has seen a 30-foot drop
in pumping level since 1984. The new Well No. 13 has a 10-foot seasonal drop this
summer. Well No.3 on the west side of the city has seen a similar static level drop.
Lower static levels means less water available to pump. With seasonal well capacity
diminishing more wells are needed to keep pace with demand.
4. Even with great efforts by staff over the last two years to educate the community on
water conservation, 2009 will be another record breaking year for water use. In the
10 months of2009, Chanhassen has pumped 1.202 billion gallons, more than all 12
months of 2008 (1.176 billion gallons). It is the City staff s opinion that our
production should continue to keep pace ahead of city demand with a small
allowance for mechanical failure and routine maintenance.
5. The City continues to grow and add additional irrigation demand. The addition of the
Chanhassen High School, additional residential/commercial developments and
existing residents adding irrigation systems is expected to add to the summer peak
demand. This demand will be exacerbated if we continue to see below average
summer rainfall totals.
SCOPE OF WORK
The scope of the proposal includes design and bidding services and part-time construction
observation. The scope also includes working with the DNR and Minnesota Department of
Health on securing the appropriate permits. Also included in this proposal is design work for
construction of a monitoring well that the DNR is anticipated to require for this well. City
staff will still be needed for construction observation.
PROPOSAL
On October 2,2009, staff received a professional service contract proposal for the well
improvement from Barr Engineering.
Barr Engineering
Submitted riar to the deadline
Pro osal format
Transmittal letter submitted with
re uired information
Members of the consultant team
identified
Understandin
Fee
v"
v"
v"
./
./
$48,200
Barr Engineering was the firm that completed the groundwater model study for the City after
the 2007 wells failed and was the design firm that completed the Well Nos. 12 and 13
improvements. Their work for the City was acceptable. Staff is requesting to use Barr
Engineering for the well improvements because we believe they have the experience and the
background of the City system and water production issue to successfully complete the
g:\eng\public\_2010 projects\10-03 well no. 14\110909 approve consultant contractrev1.doc
Paul Oehme
Well No. 14: Approve Consultant Contract
November 9, 2009
Page 3
project and give the best recommendations to the City. Barr Engineering has extensive
knowledge in well design and construction experience. They have shown to have extensive
knowledge in Minnesota on well project for both municipal and commercial clients. Barr
Engineering works with the Met Council on the metro wide groundwater model. The firm
comes highly recommended.
Staff has reviewed the design services contracts for the last four wells put into production.
The Barr Engineering proposal is in line with the engineering fees charged for the other
wells. Staff has also reviewed the hourly service charge and they are in line with other firms.
The consultant contract work will be contracted on a time and materials bases with a not-to-
exceed amount. As with all City engineering contracts, the consultant must submit periodic
invoices that staff will review before processing. The consultant will be required to submit
timesheets verifying the hours worked on the project and expense sheets. Staff will review
the invoices and expense sheets for accuracy and conformance to the contract.
SCHEDULE
Staff anticipates the following project schedule:
Bid Opening
Award Construction Contract
Substantial Completion
December, 2009
January, 2010
June, 2010
Attachments Location Map
CIF
c: Brian LeMon, Barr Engineering
Kevin Crooks, Utility Superintendent
g:\eng\public\_2010 projects\10-03 well no. 14\110909 approve consultant contractrev1.doc
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Capital Improvement Program 2009 thru 2013 Contact Paul Oehme
City of Chanhassen, MN Department Water System Improvements I
Project # W-043 Type Improvement
Useful Life .,
Project Name Well #14 Improvements Category Utilities I
Account # 1 Account # 3 Priority n/a
Account #2 Total Project Cost $750,000 I
Description I
This well is proposed to meet the water needs of the growing community. I
.
I
Justification I
To meet the growing water needs ofthe City. I
j
Expenditures 2009 2010 2011 2012 2013 Total I
Construction 750,000 750,000
Total 750,000 750,000
I
I
Fundhig Sources 2009 2010 2011 2012 2013 Total
Water UtilitY Fund 750,000 750,000 I
Total 750,000 750,000
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Operational Impact/Other I I
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138 I