Board awards $1.69M sewer lining and manhole rehab contract; project uses federal grant for 80% of cost

The Grosse Ile Township Board approved a contract to the low bidder, DVM, for sewer lining, spot repairs and manhole rehabilitation at a base cost of $1,688,281, with a 15% contingency bringing the total authorization to $1,941,523.15. Trustees voted to award the contract after the Department of Public Services described the project scope and funding.

DPS staff said the work is a rebid of a 2024 project list prioritized from the township’s sanitary sewer asset management plan. The program includes (1) cured‑in‑place lining of sanitary sewer mains, (2) spot structural lining where localized defects exist, and (3) manhole rehabilitation using a multi‑layer polyurea or similar system. Staff noted the anticipated useful life of many lining systems exceeds 30 years, with some cured‑in‑place installations designed for 100 years.

Financially, staff said approximately 80% of the project cost will be covered by a U.S. Environmental Protection Agency grant under the township’s prior appropriation; the township will fund the remaining 20% plus engineering costs. Work is scheduled to begin in August 2025 and continue through April 2026.

Trustees asked about the rebid; staff said the initial low bidder from the prior solicitation withdrew, prompting a rebid that produced several close bids. Staff described inspection, cleaning and video‑televising of lines as part of their five‑year asset‑management program and said prioritization targeted lines serving multiple homes and the worst‑condition assets.

Why it matters: The project addresses failing sanitary infrastructure, reduces groundwater infiltration to the treatment plant, and is largely grant‑funded, which limits direct township expense while improving system reliability.

Ending: Staff said they would notify residents in work zones about timing and likely short interruptions to service when line segments are cured and laterals are reopened.