Lake Cushetunk Dam

About Lake Cushetunk Dam

The primary purpose of Lake Cushetunk Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Township Of Readington (local government). It impounds the South Branch Rockaway Creek.

The dam stands 20 feet tall and stretches 594 feet across, creates a reservoir covering 30 acres, has a maximum storage capacity of 365 acre-feet, and collects water from a drainage area of 12 square miles. Completed in 1928, 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 10/30/2024.

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