Conowingo Dam (kŏnˌəwĭngˈgō) [key], 4,648 ft (1,417 m) long, 102 ft (31 m) high, on the Susquehanna River, NE Md.; completed 1928. It is one of the largest nonfederal hydroelectric power plants in the United States. Conowingo Lake, formed by the dam, extends 14 mi (23 km) upstream.
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