San Joaquin

Located at the base of the Tehachapi Mountains in Kern County, the A.D. Edmonston Pumping Plant provides the largest lift within the California Department of Water Resources State Water Project system.

Located at the base of the Tehachapi Mountains in Kern County, the A.D. Edmonston Pumping Plant provides the largest lift within the California Department of Water Resources State Water Project system. DWR/2019

The San Joaquin Field Division, located in Bakersfield, serves Kern, Kings, San Luis Obispo and Santa Barbara counties. The field division is responsible for the operation and maintenance of 123 miles of the California Aqueduct, as well as the Coastal Branch Aqueduct.

Four pumping plants known as the Valley String – Buena Vista, Teerink, Chrisman, and Edmonston Pumping Plants –  move water over the Tehachapi Mountains and into Southern California. The Edmonston Pumping Plant, the highest single lift pumping plant in the world, lifts water nearly 2,000 feet up the Tehachapi Mountains. Water travels to the Tehachapi Crossing where it marks the end of the field division boundary before beginning its journey over the mountain range and into Southern California.  

The field division also maintains and operates the Coastal Branch Aqueduct, which extends 14.8 miles, and includes nearly 100 miles of buried pipelines and five pumping plants.

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Contact San Joaquin Field Division

Call (661) 858-5500