A Tale of Three Dams Along the Owens Valley Fault System

Speaker: Scott Lindvall, 2019-2020 AEG/GSA Jahns Lecturer

The Los Angeles Aqueduct system, owned and operated by the Los Angeles Department of Water and Power (LADWP), delivers water from the Owens Valley in eastern California to the City of Los Angeles in southern California. Three dams (Tinemaha, North Haiwee, and South Haiwee) belonging to the aqueduct system in the Owens Valley are located on or adjacent to active faults, including the Owens Valley fault zone that produced a large surface-rupturing earthquake in 1872 (about 40 years prior to the construction of these facilities). These aging dams are being reassessed and either rebuilt or rehabilitated by the Los Angeles Department of Water and Power to accommodate ground motion, liquefaction, and fault displacement hazards. The presentation will provide a brief history of the aqueduct and construction of these three dams, the recent investigations at these dam sites to assess the fault displacement hazard, and LADWP’s plans for increasing the resilience of these facilities.

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A Tale of Three Dams Along the Owens Valley Fault System