Front:
General View of Conowingo Dam, Spillway and Power House
Back:
HE Hydro-Electric Plant on the Susque-
hanna River at Conowingo, Maryland,
which is part of the Philadelphia Electric
Company System, is the largest water-power
development in the United States, with the
exception of Niagara Falls. The dam, almost
a mile across and surmounted by a highway
bridge 20 feet wide, forms a lake fourteen
miles long. The initial installation is 378,000
H. P. which will eventually be increased to
594,000 H. P. A 220,000 volt transmission line
carries current to Philadelphia. Work was
started March 8, 1926, and the first units
were put into operation March 1, 1928.
