Berlin Lake (US Army Corps of Engineers) webpage
Berlin Lake webpage
Berlin Lake map
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Authorized by the Flood Control Act of 1938, Berlin Lake is one of 16 flood control projects in the Pittsburgh District. The project provides flood protection for the Mahoning River Valley was well as for the Beaver and Upper Ohio Rivers. Since its completion in 1943, Berlin has prevented flood damages estimated to be in excess of $1.7 billion. The project has the capability to store the equivalent run-off of 6.9 inches of precipitation from its 249 square mile drainage area.
The project also provides communities downstream with a clean and dependable water supply and has helped to alleviate pollution problems along the Mahoning River Valley. Additionally, Deer Creek Dam, which was built on project lands by the City of Alliance, Ohio, under an agreement with the Department of the Army, provides a reservoir for domestic water supply to nearby communities.
From Berlin Lake and Recreation webpage
Restroom facilities can be found at the headquarters building, the picnic area by the dam, and the Circle Restaurant in Deerfield.