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Consultant: North Coupe sewers show defects and sediment buildup; $370,000 in targeted fixes identified
Summary
A consultant reported results of a Minnesota Pollution Control Agency (MPCA) resiliency grant televising project that identified about $370,000 in defects for roughly 21,000 ft of sewer and recommended prioritized cleaning, lining and repairs alongside earlier 2023 findings that raise systemwide needs to roughly $2.2 million at 2023 prices.
Jason, the consultant who led the televising work funded through an MPCA resiliency planning grant, told the North Coupe Sanitary District board that the recent televising of roughly 21,000 linear feet of sewer revealed scattered defects but no immediate catastrophic failures. “There wasn't anything like significant as far as giant breaks,” Jason said, adding that the report identifies a mix of short liners, localized digs for repair, and about 15 service connections that need attention.
Jason said the crew found sediment and sand filling some lines — particularly near the district ponds — and recommended approximately 6,360 linear feet of heavy cleaning to reduce the risk of backups. He also noted corrosion in the final runs into several lift stations where cast-iron sections were exposed to prolonged sewage detention, and suggested lining or targeted repairs for those sections.
The consultant summarized costs tied to the 21,000-foot review at about $370,000 and placed that figure in the context of earlier work: a 2023 assessment of interceptor sewer segments (about 33,000 ft) involved extensive lining recommended at roughly $1.4 million, and manhole repairs previously identified could add several hundred thousand dollars. Jason estimated that, using 2023 price levels, combined system needs from the three reports amount to about $2.2 million.
Board members asked the consultant to prepare a prioritized table that combines the new recommendations with the earlier 2023 findings, update the 2023 cost estimates to current prices, and identify priority 1–3 projects for budgeting and grant pursuit. Jason advised the board to consider doing lining and other work in drier months (late summer into fall) to reduce bypass-pumping costs, and noted that MPCA permitting documents should be submitted prior to construction. He also cautioned that some of the older video relied on in prior recommendations dates from 2018 and 2021 and recommended re-televising those sections before preparing bidding documents to avoid surprises.
The board discussed funding options — local budgeting, low-interest loans and possible MPCA implementation grants — and asked staff to return with the prioritized table and updated cost estimates. The board did not take immediate construction action at the meeting; Jason indicated the televising contractor that produced the clear video would likely bid on construction work if publicly advertised.
