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This project involves the Rehabilitation of Surprise Lake Dam and Seeley’s Pond Overtopping Improvements in the Borough of Mountainside/City of Summit, Union County, New Jersey. FPA’s scope of work included contract administration, construction inspection services and quality control testing.

The Lake Surprise Dam is located in the Watchung Reservation. The dam is an embankment dam with embedded steel sheet piling along the upstream face and a Stone Masonry downstream face. The length of the dam is approximately 200 feet and the maximum height is 13 feet. The dam is currently in disrepair with several large diameter trees growing throughout the dam embankment along the downstream face of the stone masonry wall. In addition the Stone Masonry wall has collapsed in several locations. The dam did not meet the current NJ Dam Safety Standards, which the improvements provided.

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