1c. West-Central Lotus Lake Improvement Project
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-C'-.
_A-4
MEMORANDUM
Paul Oehme, Directar af Public Warks/City Engineer Vo/O.
TO:
FROM:
,~.
Terry Jeffery, WaterResaurces Caardinatar
DATE:
February 25,2008
SUBJECT:
West-Central Latus Lake Impravement Praject No.. 08-02:
Autharize Preparatian af Feasibility Study and Apprave Cansultant Cantract
far Meadaw Green Park Pand
REQUESTED ACTION (Simple Majarity Vate Required)
City Cauncil is recammended to. autharize the preparatian af a feasibility study far the West-
Central Latus Lake Impravement Project and apprave a cansultant cantract in the amaunt af
$102,000.00 with WSB & Assaciates, Inc.
BACKGROUND
The Meadaw Green Park pand failed in 2005 during large back-to-back rain events. This
resulted in flaading within the area, erasian af the autlet channel with subsequent discharge
af sediments into. Latus Lake and the expasure af a sanitary sewer line. The. pand was
repaired but the deficiencies were nat addressed. In additian, sanitary sewer lines are knawn
to. exist in praximity to. the pand such that inflaw and infiltratian maybeanissue.
On July 27,2007, a Request far Propasals (RFPs) far thisprajectwassenttoSEH, Inc.,
Kimley-Harn and Associates, Inc. and WSB & Associates, Inc. The twoprapasals received
are summarized as fallaws:
Kimley-Horn and
Assaciates, Inc.
Submitted rior to. the deadline
Proposal farmat
Transmittal letter submitted with
re uired infarmatian
Members of the cansultant team
identified
Understanding af project
Base Fee
Revised Fee
./
./
./
./
./
$127,065
./,
$120;582 '
$102,000
Since July, 2007, this project has been in on-going negotiations with the Riley-Purgatary-
Bluff Creek Watershed Districtq)J>I3~\VR}t9Aeyelap apallabarative cos,t share. To. date,
no. agreement has been reached. TheR-]i>BCWDhas levied maney far a water ql'lality
improvement praject within the Latus Lake watershed. It has yet to. be determined when this
project will cammence and haw it will relate to. the propased wark. Initially, the RPBCWD
will be building a hydrolagic madel but this madel is nat anticipated to. be finished before
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,
Paul Oehme
February 25, 2008
West-Central Lotus Lake Imp. Project
Page 2
2009 and will only address existing conditions and not necessarily identify any potential
solutions to the known issues within the West-Central Lotus Lake area. Staff is already
aware of the deficiencies associated with the Meadow Green Park pond and feels the project
should move forward at this time. City staff will continue negotiating with the Watershed
District for some type of cost share. The scope of services has been decreased from the
original RFP assuming no matching funds.
Detailed Work Plan
The scope of the project includes:
Task 1: Prepare Feasibility Report
Provide a feasibility level analysis and report for the West-Central Lotus Lake
Improvement Project. This feasibility study will provide an analysis,
recommendation, opinion of cost and financing options to address the following
concerns within the West-Central Lotus Lake Study Area:
· Reduce stormwater flow rates from subwatersheds tributary to Meadow Green
Park
· Reduce or eliminate storm sewer surcharge at Kerber Blvd. and Bighorn Drive
· Reduce or eliminate stormwater ponding in the Lotus Woods Development
· Stabilize berm from stormwater flows in Meadow Green Park
· Reduce storm water pond outlets and culvert crossings susceptibility to
plugging with debris
· Stabilize stream channels to reduce erosion and protect City facilities
· Protect or relocate sanitary sewer to prevent damage from erosion and to reduce
inflow and infiltration
· Determine sources and solutions to inflow and infiltration into the sanitary
sewer tributary to Lift Station #10
A neighborhood will be held that the residents can share their concerns before any
established ideas for the project. Individual meetings with concerned residents will
also be held before completing the feasibility report. A final neighborhood meeting
would be held once the feasibility report is drafted, prior to presentation to the City
Council.
The feasibility study will contain recommendations for improvements to Meadow
Green Park that may take place in the winter of 2008/2009.
Task 2: Meadow Green Park Pond Improvements
The consultant will prepare preliminary and final plans and specifications of the
recommended alternatives for Meadow Green Park for construction in the 2008/2009
winter season. Preparation of the plans and specifications are anticipated to include
the following:
· Coordination to obtain soil work
· Field surveying, including site surveys of subwatersheds, including lowest floor
elevations for up to 40 homes adjacent to drainageways, wetlands or ponds
· Identifying areas where easements are required
· Preparation of legal descriptions and exhibits for easement acquisition
g:\eng\public\_2008 projects\08-02 west-central lotus lake improvements\022508 meadows green park pond award con cont.doc
Paul Oehme
February 25,2008
West-Central Lotus Lake Imp. Project
Page 3
· Bidding of the project
The construction of improvements in the winter of 2008/2009 may be effected by the
review time of permitting agencies.
Task 3: Meadow Green Park Wetland Services
The Consultant will review aerial history and previous plans and permits of Meadow
Green Park to determine the regulatory status of wetlands located within the park.
They will provide wetland delineation as necessary to facilitate the proposed
improvements. Coordination with wetland review agencies will need to be included
in the project. These agencies may include:
,
· City of Chanhassen
· Minnesota Department of Natural Resources
· Army Corps. of Engineers
· Watershed management organizations/districts
· Carver County
Task 4: Meadow Green Park Pond Improvement Surveying
The Consultant will provide survey support, as necessary, to complete the feasibility
study, final design, construction documents, and wetland services for this project.
Task 5: Coordinate with the Riley-Purgatory-Bluff Creek Watershed District
The Consultant will work closely with the Watershed District to gain project support
and possible additional funding for the construction of the Meadow Green Park pond
and wetland improvements. The Watershed District will be brought into the process
at the beginning, to review opportunities for funding and in which elements they may
desire to participate, as well as to understand any permitting or other concerns they
may have with the analysis and recommended improvements.
Task 6: Anticipated Project Meetings
Staff anticipates the following meetings:
· One Planning Commission meeting
· Two City Council meetings
· Two neighborhood informational meetings
· Six staff meetings with the Consultant
· Five individual property owner meetings (during feasibility report preparation)
· Two Watershed District meetings
Task 7: Construction Observation Services
The Consultant will provide part-time construction observation services for the
winter 2008/2009 Meadow Green Park pond improvement project. They will
provide a qualified construction services representative who will attend necessary
meetings with the contractor, utility companies, property owners, and coordinate
g:\eng\public\_2008 projects\08-02 west-central lotus lake improvements\022508 meadows green park pond award con cont.doc
Paul Oehme
February 25, 2008
West-Central Lotus Lake Imp. Project
Page 4
material testing services. The construction observer will manage the project and
provide direction as necessary during construction.
Task 8: Meadow Green Park Pond Improvement Survey/Staking
The Consultant will provide construction staking and surveying as necessary to
construct improvements located within Meadow Green Park during the winter of
2008/2009.
Task 9: As-Built Drawings
The Consultant will provide as-built drawings in a timely fashion on the Meadow
Green Park Pond Improvements. It is anticipated that survey work will be required in
order to provide a good record of these improvements.
SCHEDULE
If this project moves forward, staff anticipates the following project schedule:
Award Consultant Contract February 25, 2008
Neighborhood Meeting Marchi April, 2008
Bid Opening October, 2008
Neighborhood Meeting November, 2008
Start Construction December, 2008
Construction Complete Late May, 2009
FUNDING
Funding for the feasibility study is programmed to come from the Surface Water
Management Fund 4300 - Fees, Services. Funding for construction of the project is
anticipated to come from the CIP SWMP-031. A total of $400,000 has been budgeted for the
project with $200,000 each budgeted in 2008 and 2009. City staff will continue to negotiate
with RPBCWD to see if a cost-share arrangement can be reached but thus far efforts have not
met with any success.
The contract will be a time and materials based work not to exceed amount. As with all
engineering contracts, the consultant must submit periodic invoices that staff will review
before processing. The consultant will be required to submit time sheets 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.
RECOMMENDATION
Move to authorize the preparation of a feasibility study for the West-Central Lotus Lake
Improvement Project No. 08-02 and approve a consultant contract with WSB & Associates,
Inc. in the amount of $102,000.00 for complete engineering services related to the Meadow
Green Park pond project.
Attachment:
Project Area Map
CIP
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CITY OF
CIJANHASSEN
PROPOSED IMPROVEMENTS
1 inch equals 750 feet
West Central Lotus Lake
Storm Sewer Features
~
Capital Improvement Program
City of Chanhassen, MN
2008 thru 2012
Contact
Department Surface Water Management
Project #
SWMP-031
Type Improvement
Useful Life
Project Name West Lotus Lake Drainage Improvements
Account # 1
Account # 3
Category SWMP
Priority nla
Account #2
Total Project Cost $800,000
Description I
This improvement project addressess storm water quality and quantity issues in the Lotus Lake water shed. In 2005, the regional pond over topped
causing significant damage down stream. The storm water ponding in this area was discussed with the City Council during the review of the Lotus
Woods development. The Water Shed District has made Lotus Lake a high priority in their capital improvement plan. It is proposed the City work
Uointly with the Water Shed District on this project. The funding from Other Agency Contributions will come from Water Shed District funds.
Justification I
To improve water quality and quantity in the Lotus Lake water shed.
c
Expenditures
Construction
2008
400,000
400,000
2009
400,000
400,000
2010
2011
2012
Total
800,000
800,000
Total
Funding Sources 2008 2009 2010 2011 2012 Total
Other Agency Contribution 200,000 200,000 400,000
Surface Water Utility Fund 200,000 200,000 400,000
Total 400,000 400,000 800,000
Operational Impaet/Other I
114