HomeMy WebLinkAbout6.i. Order Plans & Spec's for Wensmann Pond Stabilization, City Project # 334'1
CITY OF ROSEMOUNT
EXECUTIVE SUMMARY FOR ACTION
CITY COUNCIL MEETING DATE: October 2, 2001
AGENDA ITEM: Order Plans & Spec's — Wensmann Pond
Bank Stabilization, City Project #334
AGENDA SECTION:
Consent
PREPARED BY: Bret A. Weiss, Interim City Engineer
AGEN j
. `
ATTACHMENTS: Resolution, WSB Memo
APPROVED BY:
Wensmann Pond has been experiencing some bank erosion since the Birger Pond project was
completed to discharge into the pond. Throughout this year, the Utility Commission has been
studying methods and options to deal with this erosion as well as to develop plans for pond
vegetation for future ponds. The residents around the pond have requested that rock
stabilization be used in this instance, which was recently approved by the Utility Commission.
Attached is the Utility Commission agenda item for your review.
We are requesting authorization to proceed with plans and specifications to bid the project for
late fall /winter /spring construction.
RECOMMENDED ACTION: MOTION TO ADOPT A RESOLUTION ORDERING THE
PREPARATION OF PLANS AND SPECIFICATIONS FOR THE WENSMANN POND BANK
STABILIZATION, CITY PROJECT #334.
COUNCIL ACTION:
2
CITY OF ROSEMOUNT
DAKOTA COUNTY, MINNESOTA
RESOLUTION 2001 —
A RESOLUTION ORDERING THE
PREPARATION OF PLANS AND SPECIFICATIONS FOR
WENSMANN POND BANK STABILIZATION
CITY PROJECT #334
NOW THEREFORE BE IT RESOLVED, by the City Council of the City of Rosemount
hereby orders the preparation of plans and specifications for the Wensmann Pond Bank
Stabilization, City Project #334.
ADOPTED this 2 nd t day of October, 2001.
Cathy Busho, Mayor
ATTEST:
Linda Jentink, City Clerk
Motion by:
Voted in favor:
Seconded by:
Voted against:
ramlipiq
Date:
IW
Utility Commission, City of Rosemount
Pete Willenbring, P.E., WSB & Associates, Inc.
September 6, 2001
Memorandum
Recommendation Regarding Wensmann Pond Bank Stabilization
WSB Project No. 1005 -29
As a follow -up to our Utility Commission meeting last month, outlined below please find
our recommendation for stabilization of the shoreline of Wensmann Pond.
Background
Wensmann Pond is a man-made pond that has recently been subject to receiving increased
volumes of water as a result of pumping from ponds located north of Wensmann Pond.
Multiple factors have resulted in erosion around Wensmann Pond. These factors relate to
the increased storm water input, steep slopes, increased water elevations for extended
periods of time, wave action, and lack of a vegetation buffer.
Recommendation
In consideration of the Design Guidelines for Pond Shoreline Stabilization Practices that
were developed and reviewed by the Commission at the last meeting, we offer the following
recommendation:
• The north section of the pond should be stabilized with hard armoring in the form of
Random Riprap (Class 1). Conditions in this portion of the shoreline are consistent
with criteria described in the guidelines that necessitate hard armoring stabilization.
• The east and south sections of the shoreline would be suitable for either vegetating or
hard armoring practices. Establishment of vegetation along these portions of the
shoreline may require additional, long -term management. Based on meetings with
residents, the majority of residents around the pond prefer hard armor stabilization to
prevent erosion of the shoreline while still allowing easy access to the pond.
Because of the recent change in conditions of the pond and the fact that Wensmann
Pond is not a new pond, the Commission should consider the residents preference for
using hard armoring in this situation.
• The shoreline along the western edge of the pond is currently vegetated and the
vegetation along this portion of the shoreline should be evaluated as part of the
415001s I on project to determine the presence and percentage of native species. We recommend
Memorial Highway that any invasive non - native species be eliminated and native species be installed
Suite 300 along this section in areas that may experience erosion.
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