City Council Meeting Date: September 1, 2020
To: Mayor and City Council
City Administrator
From: Sean M. Simonson, Engineering Division Manager
David E. Bennett, Public Works Director/City Engineer
Cole Johnson, Water Quality Technician
Subject:
TITLE
Consider Approving Plans and Specifications and Order Advertisement for Bids for the Golf Course, Parmeadow Ponds 1 & 3 Dredging Project - (STRM2020-K25)
BODY
Action Requested:
The City Council considers approval of the attached Resolution approving the plans and specifications and authorizing the advertisement for bids for the Golf Course, Parmeadow Ponds 1 & 3 Dredging Project - (STRM2020-K25)
Summary Report:
In 2017, the City of Northfield performed a Stormwater Pond Assessment on 56 ponds within the City of Northfield. Out of this pond assessment project, eight ponds were isolated for further assessment due to the total sediment accumulation discovered during the pond assessment. These eight ponds were then ranked one to eight based on their percent full of sediment. The Golf Course Pond, and Parmeadow Pond #3 were ranked #1 and #2 respectively based on the criteria above, and Parmeadow Pond #1 was ranked #7 (Attachment 2).
Staff has developed a cleaning program for these eight ponds through the Capital Improvement Program (CIP), and these three ponds are scheduled for cleaning in the adopted 2020-2024 CIP.
This pond dredging projects include dewatering, excavating, and disposing of the accumulated sediment in the ponds. All of the ponds had the sediment tested for hazardous substances or petroleum products, specifically carcinogenic and noncarcinogenic Polycyclic Aromatic Hydrocarbons (cPAH/PAH), copper, or arsenic which may have been disposed or released into the ponds. The Minnesota Pollution Control Agency (MPCA) requires sediment testing for the aforementioned contaminants so their guidance and practices were followed when completing the testi...
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