Deep Creek Dam

The Deep Creek Dam located about 8 miles north of Oakland, Maryland, consists of an earth and rockwall dam across a tributary of the Youghiogheny River that was completed in 1925 by the Pennsylvania Electric Company. Construction of the dam created the Deep Creek Lake. The twin water turbine 20 MW hydroelectric plant, acquired by Brookfield Renewable Power, Inc., in 2005, became operational in 1928.

Source: Wikipedia