California Water Wars - The Second Owens Valley Aqueduct

The Second Owens Valley Aqueduct

In 1970, LADWP completed a second aqueduct. In 1972, the agency began to divert more surface water and pumped groundwater at the rate of several hundred thousand acre-feet a year (several cubic metres per second). Owens Valley springs and seeps dried and disappeared, and groundwater-dependent vegetation began to die.

Because LADWP had never completed an Environmental Impact Report (EIR) addressing the impacts of groundwater pumping, Inyo County sued Los Angeles under the terms of the California Environmental Quality Act. Los Angeles did not stop pumping groundwater, but submitted a short EIR in 1976 and a second one in 1979, both of which were rejected as inadequate by the courts.

In 1991, Inyo County and the city of Los Angeles signed the Inyo-Los Angeles Long Term Water Agreement, which required that groundwater pumping be managed to avoid significant impacts while providing a reliable water supply for Los Angeles, and in 1997, Inyo County, Los Angeles, the Owens Valley Committee, the Sierra Club, and other concerned parties signed a Memorandum of Understanding that specified terms by which the lower Owens River would be rewatered by June 2003 as partial mitigation for damage to the Owens Valley due to groundwater pumping.

In spite of the terms of the Long Term Water Agreement, studies by the Inyo County Water Department have shown that impacts to the valley's groundwater-dependent vegetation, such as alkali meadows, continue. Likewise, Los Angeles did not rewater the lower Owens River by the June 2003 deadline. As of December 17, 2003, LADWP settled a lawsuit brought by California Attorney General Bill Lockyer, the Owens Valley Committee, and the Sierra Club. Under the terms of the settlement, deadlines for the Lower Owens River Project were revised. LADWP was to return water to the lower Owens River by 2005. This deadline was missed, but on December 6, 2006, a ceremony was held (at the same site where William Mulholland had ceremonially opened the aqueduct and closed the flow through the Owens River) to re-start the flow down the 62 miles (100 km) river. David Nahai, president of the L.A. Water and Power Board, countered Mulholland's words from 1913 and said, "There it is ... take it back."

Groundwater pumping continues at a higher rate than the rate at which water recharges the aquifer, resulting in a long-term trend of desertification in the Owens Valley.