Mokelumne Aqueduct

Mokelumne Aqueduct
Location of the Mokelumne Aqueduct in California
Coordinates37°54′N 121°30′W / 37.9°N 121.5°W / 37.9; -121.5
BeginsPardee Reservoir, Amador/Calaveras Counties
Endsnear Walnut Creek, Contra Costa County
Maintained byEast Bay Municipal Utility District
Characteristics
Total length95 mi (153 km)
First section diameter61 in (1.5 m)
Second section diameter67 in (1.7 m)
Third section diameter87 in (2.2 m)
Capacity700 cu ft/s (20 m3/s)
History
Construction start1926
Opened1929 (Aqueduct No. 1)
1949 (No. 2)
1963 (No. 3)
Location
Map

The Mokelumne Aqueduct is a 95-mile (153 km) water conveyance system in central California, United States. The aqueduct is supplied by the Mokelumne River and provides water to 35 municipalities in the East Bay in the San Francisco Bay Area. The aqueduct and the associated dams, pipelines, treatment plants and hydroelectric system are owned and operated by the East Bay Municipal Utility District (EBMUD) and provide over 90 percent of the water used by the agency.

The aqueduct is the sole water supply for about 1.4 million people in the East Bay.[1] Under present water rights agreements, EBMUD can withdraw up to 325 million gallons (1,230,000 m3) per day, or 364,000 acre-feet (0.449 km3) per year, from the Mokelumne River. In addition, up to 98 million gallons (371,000 m3) per day or 110,000 acre-feet (0.14 km3) per year can be supplied via a branch from the Sacramento River. However, this supply is expected only to be used in the driest 35% of years.[2]

  1. ^ Cite error: The named reference gei was invoked but never defined (see the help page).
  2. ^ Northeast San Joaquin County Groundwater Banking Authority (April 2002). "Northeast San Joaquin County Groundwater Bank – System Plan Components Inventory" (PDF). County of San Joaquin. Retrieved 2014-01-16.