San Joaquin Field Division Liner Raise and Instrumentation Project

The California Department of Water Resources (DWR) evaluated the potential environmental impacts of the San Joaquin Field Division (SJFD) Liner Raise and Instrumentation Project (Approved Project) in a Mitigated Negative Declaration (MND), certified in 2020 (Approved Project MND). The Approved Project included raising portions of the California Aqueduct (Aqueduct) concrete liner of Pools 24 and 25, on each side, for approximately 1.65 miles and installation of water level monitoring in Pools 22 and 25. Since the certification of the Approved MND, DWR, in addition to raising the concrete liner of Pools 24 and 25 and installation of water level monitoring in Pools 22 and 25, has expanded the length of the Approved Project from 1.65 miles to 12.6 miles (Revised Project). This expansion warrants preparation of an addendum to the Approved Project MND (Addendum) pursuant to the California Environmental Quality Act (CEQA) Section 15164. This Addendum, together with the 2020 Approved Project MND, will be used by DWR when considering approval of the Revised Project.