Plantain Pond Dam

About Plantain Pond Dam

The primary purpose of Plantain Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by The Nature Conservancy Of Massachusetts, Inc. (private). It impounds the Bear Rock Stream near Mount Washington.

The dam stands 15 feet tall and stretches 240 feet across, creates a reservoir covering 62 acres, has a maximum storage capacity of 500 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1947, the structure is well-established, with more than 75 years 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. An emergency action plan is in place for this dam. The most recent inspection on record was 07/29/2022.

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