Lake Edwin Johnson Dam

About Lake Edwin Johnson Dam

The primary purpose of Lake Edwin Johnson Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Sc Department Of Natural Resources;sc Department Of Parks Recreation And Tourism (state). It impounds the Thompson Creek.

The dam stands 36 feet tall, creates a reservoir covering 38 acres, and has a maximum storage capacity of 570 acre-feet. Completed in 1942, 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 12/21/2022.

At 36 feet, this dam is taller than 83% of dams nationwide.

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