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Gardiner council accepts 2025 CSO master plan, directs DEP schedule negotiations tied to funding
Summary
The Gardiner City Council unanimously accepted the 2025 Combined Sewer Overflow master plan and directed staff to negotiate the DEP schedule for required projects based on funding availability.
Gardiner — The Gardiner City Council on a unanimous vote accepted the city’s 2025 Combined Sewer Overflow (CSO) master plan and then voted to amend that acceptance so staff may negotiate the implementation schedule with the Maine Department of Environmental Protection (DEP) to reflect funding realities.
The plan, presented by Bill Oliver of Oliver Associates, documents the city’s sewer system, models storm-driven peaks and identifies the worst upstream source areas that drive overflows at the Main Avenue pump station. Oliver said the system includes about 18 miles of sewer piping, two major pump stations and a treatment plant with a permitted capacity of about 9.7 million gallons per day (MGD). During a modeled 25‑year storm (about 5.4 inches in 24 hours) the system could produce roughly 13.22 MGD — about 3.5 MGD above treatment capacity, the presentation stated.
Oliver named three high‑priority source areas for remediation: Spring Street (measured…
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