Mamanasco Lake Dam

About Mamanasco Lake Dam

The primary purpose of Mamanasco Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Camp, Jr. (private). It impounds the Titicus River Trib near Ridgefield.

The dam stands 6 feet tall and stretches 120 feet across, creates a reservoir covering 87 acres, has a maximum storage capacity of 435 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1870, the structure is one of the older dams in the region, with over a century and a half of service.

This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 06/02/2022.

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