1b Sewer & Water Comprehensive Plan UpdatePW421 & Wetland Protection Plan Update, PW379A: Approve Consultant Contracts
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
~O~
Paul Oehme, City Engineer/Dir. of Public Works '\ a
o~.
FROM:
DATE:
January 22, 2007
SUBJ:
Sewer & Water Comprehensive Plan Update, PW421A &
PW421B & Wellhead Protection Plan Update, PW379A: Approve
Consultant Contracts
BACKGROUND
The current sanitary sewer and water comprehensive plan were completed in
1998.
The City's wellhead protection plan was completed in 2002.
DISCUSSION
Sanitary Sewer and Water Comprehensive Plan
Every 10 years, the Metropolitan Council requires cities to update their
comprehensive plans. The updates are required by the Metropolitan Council
Regional Plan as identified in Minnesota State Statute 473.859 Subd. 3 and
473.513. These plans are then used for regional planning. More importantly,
cities use these plans in conjunction with the Land Use Comprehensive Plan to
prepare for future growth. Also, the plans are used for improvement to the system
and to identify long-term budget needs.
The scope of the sanitary sewer and water comprehensive plan updates are as
follows:
A. Water Supply Plan
In 2003, a water master plan was completed that looked at several aspects of the
water system. This information will be used in the water supply update. In
general, the Water Supply Plan includes the following:
1. Update current and projected water demands, based on population and
land use. The demand analysis also includes the potential rezoning by
Powers Boulevard and the impacts if the area is rezoned.
2. Update water demand by customer category.
The City of Chanhassen . A growing community with clean lakes, quality schools, a charming downtown, thrivin~1 businesses, winding trails, and beautiful parks. A great place to live, work, and play.
Paul Oehme
January 22, 2007
Page 2
3. Update the hydraulic model including all existing and proposed lateral and
trunk mains. Included is a hydraulic analysis that calculates the max day,
fire flows and average day demands of the system.
4. Analysis is included that reviews the system capacity for the Powers
BoulevardlLake Lucy Road area. This area is known to have significant
pressure loss during high demand periods.
5. Identify future water treatment capacity needs for the west plant currently
scheduled for construction in 2012.
6. Update and budget for proposed infrastructure improvements (wells, raw
watermains, storage, pressure reducing valves, trunk systems etc.)
7. Update water zone map and recommend changes as necessary.
8. 20-year Capital Improvements Program, including a detailed cost estimate
for the west treatment plant.
B. Sanitary Sewer Plan
In general, the Sanitary Sewer Plan includes the following:
1. Detailed review of the area south of Lyman Boulevard. This will include
staging service to the MUSA expansion areas identified in the Planning
Comprehensive Plan.
2. Updating trunk system maps.
3. Update district drainage map and subwatershed boundaries including lift
station drainage areas.
4. Infill/lnfiltration update.
5. Review Lift Station 24 future capacity needs and recommend
improvements. Staff has identified a potential hydrogen sulfide problem
in the wet well that shall be investigated and identify any improvements.
6. Review all lift station electrical, mechanical and capacity needs and
recommend upgrade/rehabilitation. Recommend rehabilitation schedule.
7. Review existing sewer flows and identify any potential pipe capacity
issues.
8. Identify any lift stations that could be phased out.
9. 20-year Capital Improvement Program.
Proposals were received on January 5,2007. S.E.H, Inc and WSB & Associates
proposed on the projects.
The following are the bids received for the comprehensive plan update:
S.E.H.
WSB
S ani tary
Sewer Plan
$47,718
$43,738
Water Plan
$20,056
$31,132
G:\ENG\PUBLIC\PW379A Wellhead Update 9 1011 (2007)\01-22-07 aprav camp plan WHPP contract.doc
Paul Oehme
January 22, 2007
Page 3
Staff is recommending awarding the water plan update to S .E.H. and the sanitary
sewer plan update to WSB & Associates. Funding for the comprehensive plans
was budgeted in the 2007 CIP (PL-OO 1) and is proposed from the sewer and water
utility funds respectfully.
Wellhead Protection Plan Update
What is wellhead protection? Wellhead protection is a means of protecting public
water supply wells by preventing contaminants from entering the area that
contributes water to the well or well field over a period of time. The wellhead
protection area is determined by using geologic and hydrologic criteria, such as
the physical characteristics of the aquifer and the effects which pumping has on
the rate and direction of groundwater movement. A management plan is
developed for the wellhead protection area that includes inventorying potential
sources of groundwater contamination, monitoring for the presence of specific
contaminants, and managing existing and future land and water uses that pose a
threat to groundwater quality. The Minnesota Groundwater Protection Act of
1989 grants the Commissioner of Health authority to develop wellhead protection
measures for wells serving public water supplies. This action was in response to
the 1986 Amendment to the federal Safe Drinking Water Act in which states are
required to implement wellhead protection programs for public water supply
wells. Minnesota Rules, Parts 4720.5100 to 4720.5590, constitute the Minnesota
Wellhead Protection Program.
The City of Chanhassen's Wellhead protection plan was completed in August
2002. Wellhead protection plans are required to be updated whenever a new
potable City well is put in service. Well No.9, which was brought into
production in 2005, was not included in the original wellhead protection plan.
Since the City was planning on drilling Wells 10 and 11 in 2006 and have the
wells in production in 2007, the Minnesota Department of Health granted an
extension to Chanhassen for Well No.9 protection plan until Wells 10 and 11
were completed. The wellhead protection plan update includes Well Nos. 9, 10
and 11.
In general, the wellhead protection plan update includes the following tasks:
1. Aquifer Pumping Test
2. Groundwater Flow Model Development
3. Wellhead Protection Areas (WHPAs) and Drinking Water Supply
Management Areas delineation.
4. Vulnerability Assessments
5. Preparation of Wellhead Protection Plan
6. Distribution and Plan to local units of government for comment
7. Submit plan to the Minnesota Department of Health
G:\ENG\PUBLIC\PW379A Wellhead Update 9 10 II (2007)\01-22-07 aprov comp plan WHPP contract.doc
Paul Oehme
January 22, 2007
Page 4
Staff has received proposals for the wellhead protection plan update as follows:
S.E.H.
WSB
Wellhead Protection
Plan Update
$18,500
$18,900
Staff is recommending awarding a contract for the wellhead protection plan
update to SEH, Inc. S.E.H., Inc. completed the original wellhead protection plan.
Their work was satisfactory. Funding for the update was budget in the in 2007
eIP (W -36) and is paid for with water utility funds.
RECOMMENDA TION
Staff recommends awarding a contract to S.E.H., Inc. for the water
comprehensive plan update and the wellhead protection plan update. Staff also
recommends awarding a contract to WSB & Associates for the sanitary sewer
comprehensi ve plan update.
Attachment
cc: Todd Hubmer, WSB
Jim Norton, S .E.H.
G:\ENG\PUBLIC\PW379A Wellhead Update 9 10 11 (2007)\01-22-07 aprav comp plan WHPP contract.doc
Project #
PL-OOl
2007 thru 2011 Unassigned
Contact
Department Planning
Type Improvement
Useful Life 10-15 years
Category Planning
Priority nla
Total Project Cost $150,000
Capital Improvement Program
. City ofChanhassen, MN
Project Name Update of Comprehensive Plan
- Account # 3
Account # 1
Account #2
Description
I Update to city's 2020 Comprehensive Plan. Start the process in 2007 and complete in 2008.
Justification
Mandated by State Statute that the comprehensive plan be updated every 10 years. This is an opportunity to evaluate and re-evaluate the city's land
use designation and MUSA staging, infrastructure plan (roads, sewer, storm wter, water) and parks and open space.
Expenditures
Camp Plan Update
2007
120,000
Total 120,000
2008
30,000
30,000
2009
2010
2011
Total
150,000
150,000
. Funding Sources 2007 2008 2009 2010 2011 Total
General Fund 50,000 30,000 80,000
Sewer Utility Fund 50,000 50,000
Water Utility Fund 20,000 20,000
Total 120,000 30,000 150,000
~pperational Impact/Other
update of the comprehensive provides additional infonnation for capital improvements that may be needed to acconnnodate growth of the city.
83
Capital Improvement Program
City of Chanhassen, MN
2007 thru 2011
Contact
Project #
W-036
Department Water System Improvements
Type Unassigned
Useful Life
Category Utilities
Priority nla
ProjectName Well Head Protection Plan Update
Account # 1 700-0000-4751
Account # 3
Account #2
Total Project Cost $30,000
Description
Well head protection is designed to protect public water supply wells. Cities are required to have well head protection programs under the
provisions of the 1986 amendments to the Federal Safe Drinking Water Act. The city has a well head protection program but it needs to be
updated due to the new wells in service. The update will include wells 9, 10, and 11.
Justification
Federal and state requirements.
Expenditures
Comp Plan Update
2007
30,000
30,000
2008
2009
2010
2011
Total
30,000
30,000
Total
Funding Sources
Water Utility Fund
2007
30,000
Total 30,000
2008
2009
2010
2011
Total
30,000
30,000
Operational Impact/Other
122
.
.
II
II
II
II