Hoover Dam, Southern California Edison 138-KV Switchyard, U.S. Highway 93, Boulder City, Clark County, NV

Significance: It was the second of six major Federal switchyards built at Hoover Dam. The switchyard was built to replace the Southern Sierras Power Company substation that had provided electricity for construction of the dam. The new switchyard would reverse the direction of service, sending Hoover Dam power to San Bernadino, California. The switchyard was an integral part of the Hoover Dam electrical generation and transmission complex.
Survey number: HAER NV-27-B
Building/structure dates: 1936 Initial Construction
National Register of Historic Places NRIS Number: 81000382