Olyphant No 3

About Olyphant No 3

The primary purpose of Olyphant No 3 is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Dcnr (state). It impounds the Grassy Island Creek.

The dam stands 38 feet tall and stretches 760 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 157 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1898, the structure is over a century old.

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 09/14/2020.

At 38 feet, this dam is taller than 85% of dams nationwide.

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