HomeMy WebLinkAbout2019-2911January 24, 2019
Mr. Kevin Hansen
Director of Public Works / City Engineer
City of Columbia Heights
637 38 Avenue NE
Columbia Heights, MN 55421
Re: Proposal for BMP Retrofit - Silver Lake
Dear Mr. Hansen
2019 -2911
wsb`�'
" WSB is proposing to identify a BMP along the existing storm sewer on Stinson Boulevard that
w currently discharges into Silver Lake. The BMP would be installed along the existing 48 -inch pipe
CO line within City property to reduce TP and TSS loading into Silver Lake.
WSB will complete the following tasks:
• Review the existing drainage area inputs with GIS and SWAMP data
v a Identify a location for a BMP
• Calculate the reduction of TP and TSS with the new BMP
Provide a cost estimate for proposed work
• Detail the findings in a technical memo.
v WSB will provide the scope of services listed above for the cost of $3,925. If the City of Columbia
Heights accepts this letter proposal, please return with signatures.
z �SinceTo ° e f ental Scientist
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