Other Location Info
The Los Banos Creek Detention Dam (LBCDD or Dam) and Reservoir are federally-owned and State-operated facilities that were constructed jointly by Reclamation and the California Department of Water Resources (DWR) as part of the San Luis Unit of the CVP to provide flood control protection to the San Luis Canal/California Aqueduct. Because of its proximity, the LBCDR also provides flood protection to the City of Los Banos. The California Department of Parks and Recreation (DPR) operates the public recreational facilities at LBCDR. The Dam and Reservoir are located approximately six miles southwest of the City of Los Banos. The Dam became operational in 1962 and the Reservoir has a maximum storage of 34,562 acre-feet (AF). The LBCDR is currently operated near or below the United States Army Corps of Engineers (USACE) winter period conservation pool of 20,562 AF of storage, though summer operations allow storage of 34,562 AF as authorized by the USACE guidance manual. Maintaining LBCDR storage at 20,562 AF throughout the summer and fall promotes significant evaporation of natural inflow, which otherwise would be available for downstream groundwater replenishment and riparian use. Prior to construction of the Dam, the aquifers along the LBC received significantly more recharge from LBC flows. Appendix A shows the location of LBCDR in relation to Los Banos and the San Luis Canal. Additionally, Appendix A shows the storage curve of the Project. Currently, the Dam is strictly operated as a flood control facility during the late fall and winter months. A group of local agencies (Project Participants) propose to operate the LBCDD in the spring to route natural LBC flows to riparian lands downstream of the facility, making space available for storage. (See Appendix A) The Project Participants would then make water available for delivery into the LBCDR by using conserved water, groundwater, recovered tailwater, or water stored in the Meyers Water Bank in lieu of surface water from San Luis Reservoir (pursuant to existing Water Transfer Programs, see Appendix B, Document B-2, Document B-5 and Document B-6, which provide details regarding the Project Participant water supplies). This water would be conveyed into the available storage space in the spring and early summer. Operations would be within USACE operating rules for the facilities at the Reservoir. Stored water would be returned to the Project Participants through LBCDD in the summer or fall to meet irrigation or habitat water demands. The Project Participants consist of the SLWD, Grassland Water District (GWD), and the member agencies of the SJRECWA, which consist of Central California Irrigation District (CCID), San Luis Canal Company, Firebaugh Canal Water District, and the Columbia Canal Company.