Hammond Reservoir

 fishing area, lake, swimming pool, reservoir, boating, mine

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Administered by the United States Army Corps of Engineers, which built the Hammond Dam and Tioga Dam from 1973 to 1979 the total project cost $200 million. A channel connects the two lakes so that Hammond Lake (which has greater storage capacity) may be used to store excess (flood) water from Tioga Lake. However, in addition to flood control on the Chemung and North Branch Susquehanna Rivers, the dams are also meant to help decrease the acidity of water in the Tioga River downstream of the dams by dilution with the more neutral waters of Crooked Creek. The Tioga River's acidity is caused by acid mine drainage. The lakes offers recreational opportunities, including camping, boating, fishing, swimming, and hiking on area trails.