Los Angeles Department of Water and Power in the context of City of Los Angeles

The government of the City of Los Angeles operates as a charter city (as opposed to a general law city) under the charter of the City of Los Angeles. The elected government is composed of the Los Angeles City Council with 15 city council districts and the mayor of Los Angeles, which operate under a mayor–council government, as well as several other elective offices. Under the California Constitution, all judicial, school, county, and city offices, including those of chartered cities, are nonpartisan. The current mayor is Karen Bass, the current city attorney is Hydee Feldstein Soto and the current city controller is Kenneth Mejia.

In addition, there are numerous departments and appointed officers such as the Los Angeles Police Department (LAPD), the Los Angeles Fire Department (LAFD), the Los Angeles Department of Transportation (LADOT), the Los Angeles Public Library (LAPL), the Los Angeles Department of Public Works (LADPW), and the Los Angeles Department of Water and Power (LADWP).

Owens Valley (Mono: Payahǖǖnadǖ, meaning "place of flowing water") is an arid valley of the Owens River in eastern California in the United States. It is located to the east of the Sierra Nevada, west of the White Mountains and Inyo Mountains, and is split between the Great Basin Desert and the Mojave Desert. The mountain peaks on its west side (including Mount Whitney) reach above 14,000 feet (4,300 m) in elevation, while the floor of the Owens Valley is at about 4,000 feet (1,200 m), making the valley the deepest in the United States. The Sierra Nevada casts the valley in a rain shadow, which makes Owens Valley "the Land of Little Rain". The bed of Owens Lake, now a predominantly dry endorheic alkali flat, sits on the southern end of the valley.

The current arid nature of the valley is mostly due to the Los Angeles Department of Water and Power diverting the water of the region. The valley provides water to the Los Angeles Aqueduct, the source of one-third of the water for city, and was the area at the center of one of the fiercest and longest-running episodes of the California Water Wars. Owens Lake was completely emptied by 1926, only 13 years after Los Angeles began diverting water. The water diversions inspired aspects of the 1974 film Chinatown.

The Los Angeles Aqueduct system, comprising the Los Angeles Aqueduct (Owens Valley aqueduct) and the Second Los Angeles Aqueduct, is a water conveyance system, built and operated by the Los Angeles Department of Water and Power. The Owens Valley aqueduct was designed and built by the city's water department, at the time named The Bureau of Los Angeles Aqueduct, under the supervision of the department's Chief Engineer William Mulholland. The system delivers water from the Owens River in the eastern Sierra Nevada mountains to Los Angeles.

The aqueduct's construction was controversial from the start, as water diversions to Los Angeles eliminated the Owens Valley as a viable farming community. Clauses in the city's charter originally stated that the city could not sell or provide surplus water to any area outside the city, forcing adjacent communities to annex themselves into Los Angeles.