what was the purpose of the hetch hetchy reservoir
Hetch Hetchy In 1923, the O'Shaughnessy Dam was completed on the Tuolumne River, flooding the entire valley under the Hetch Hetchy Reservoir.[2] The dam and reservoir are the centerpiece of the Hetch Hetchy Project, which in 1934 began to deliver water 167 miles (269Â km) west to San Francisco and its client municipalities in the greater San Francisco Bay Area.
Deep Creek Lake The lake is a result of the Youghiogheny Hydroelectric Company hydroelectric project on Deep Creek in the 1920s. Deep Creek Dam, located about 8 miles (13 km) north of Oakland, Maryland, consists of an earth and rock wall dam across a tributary of the Youghiogheny River. Construction of the dam began in 1923 and was completed in 1925. The hydroelectric plant became operational at 4:00 p.m. on May 26, 1925.[4] The lake was purchased by the U.S. state of Maryland in 2000 from the Pennsylvania Electric Company and public access to the lake is provided by Deep Creek Lake State Park.[5]