Aqueduct /ˈäkwəәˌdəәkt/ n. a. 1552 Any system of pipes, ditches canals, tunnels, and other structures built to transport water.
Related Events:
1908: President Roosevelt approves San Francisco’s request to hold the water rights for the Tuolumne River, which flows through Yosemite National Park.
1912: The first water flows from the Owens Valley into the San Fernando Valley, providing Los Angeles with half of the city’s water supply.
1913: Construction of the Los Angeles Aqueduct and pumping stations is complete. The Owens Valley is slowly drained of water. John Muir and environmentalists lose their battle against the Hetch Hetchy dam.
1933: Parker Dam construction for the Colorado River Aqueduct begins.
1934: Hetch Hetchy’s 150-mile aqueduct is complete transporting water to the San Francisco peninsula.
1994: Owens Lake is now a dry alkaline lakebed due to water diversion to the Los Angeles area. Mono Lake was spared this fate when the California State Water Resources Control Board issues an order to protect Mono Lake and its tributary streams. Since then, the lake’s water level has steadily risen.








