The Metropolitan Water District of Southern California was constructing its Colorado River Aqueduct when Hoover Dam was completed in 1935. The 1928 legislation authorizing the construction of what has been called both Hoover Dam and Boulder Dam included hydroelectric power contracts to help fund the cost of the dam. MWD received a power contract which provides energy to pump Colorado River water through MWD’s Colorado River Aqueduct and subsequently constructed a 230 kilovolt transmission system which delivers the Hoover Dam electricity to MWD’s pumping plants along the Colorado River Aqueduct.