San Joaquin Field Division Liner Raise and Instrumentation Project

The California Department of Water Resources (DWR) completed construction of the San Joaquin Field Division Liner Raise and Instrumentation Project in June 2021.

The project was located at Pools 24 and 25 of the California Aqueduct, specifically in Kings and Kern Counties between Aqueduct milepost (MP) 175.16 and MP 213.00. The northernmost site, MP 175.16, Pool 22, is approximately 2 miles southwest of the town of Kettleman City. The southernmost site, MP 213.00, Pool 25, is approximately 8 miles southwest of the town of Lost Hills.

Subsidence had caused reduced flow capacity in Pools 24 and 25 of the California Aqueduct that is limiting the ability to deliver water to Southern California. The project raised portions of the concrete liner on each side of Pools 24 and 25 over 1.65 miles to gain delivery capacity lost to subsidence at isolated low points. Water level monitoring instrumentation was installed to provide real time monitoring of flow and water levels in Pools 22 and 25. This will allow DWR to maximize available water delivery capacity through those pools and give more flexibility in operation of the California Aqueduct.

Project Location Map