Laserfiche WebLink
2025 URBAN WATER MANAGEMENT PLAN <br /> MAY 2026/FINAL DRAFT/CAROLLO <br /> improve flexibility and species protection.The 2025 MET UWMP characterizes the net reliability <br /> benefit at approximately +60,000 AFY relative to prior permits, subject to hydrologic and regulatory <br /> conditions. <br /> ■ Healthy Rivers and Landscapes (HRL) Voluntary Agreements - MET supports the State's proposed <br /> Healthy Rivers and Landscapes program,which establishes a voluntary framework for improving Delta <br /> ecosystem conditions through coordinated flow contributions and habitat restoration projects.The <br /> HRL approach is intended to provide regulatory stability while supporting environmental objectives <br /> consistent with SWP operations. <br /> 6.2.4 Storage, Transfers, and Conveyance Programs <br /> Storage is a major component of MET's dry year resource management strategy. MET's likelihood of <br /> having adequate supply capability to meet projected demands, without implementing its Water Supply <br /> Allocation Plan (WSAP) depends on its storage resources. Following a significant drawdown during the <br /> 2020-2022 drought, MET rebuilt storage as hydrologic conditions improved. By the end of 2023, MET had <br /> approximately 3.4 MAF of regional dry-year storage. Storage increased to 3.8 MAF by the end of 2024, <br /> with levels projected to reach approximately 3.9 MAF by the end of 2025. MET also maintains <br /> approximately 750 thousand acre-feet (TAF) of emergency storage dedicated to catastrophic supply <br /> interruption conditions, including a major seismic failure of the Delta levees. <br /> In its 2025 UWMP, MET evaluates storage based on median starting storage at the beginning of each <br /> five-year increment, representing a 50 percent probability that actual storage will be higher or lower.This <br /> approach differs from earlier UWMPs, which relied on average storage assumptions, and provides a more <br /> conservative and realistic representation of storage availability. All storage capability values incorporate <br /> conveyance and recovery constraints associated with SWP terminal reservoirs,the CRA, and MET's <br /> in-region and out-of-region groundwater banking programs. <br /> Lake Oroville continues to serve as the SWP's largest storage facility with a capacity of approximately <br /> 3.5 MAF.Water released from Oroville moves to the Feather River and then to the Sacramento River <br /> before being pumped south at the Harvey O. Banks pumping plant into the California Aqueduct. MET's <br /> storage portfolio includes surface reservoirs such as Diamond Valley Lake, Lake Mathews, and Lake <br /> Skinner; SWP terminal storage in San Luis Reservoir; groundwater banking programs including Semitropic, <br /> Arvin-Edison, the High Desert Water Bank, Kern Delta, and Mojave; and ICS storage in Lake Mead. These <br /> storage assets provide operational flexibility during dry years and help maintain supplies during extended <br /> droughts or emergency events. <br /> MET endeavors to increase the reliability of water supplies through the development of flexible storage <br /> and transfer programs including groundwater storage (MET, 2025).These include: <br /> ■ Antelope Valley-East Kern (AVEK) Water Agency Exchange and Storage Program: Under the <br /> exchange program, for every 2 AF MET receives, MET returns 1 AF back to AVEK, and MET will also be <br /> able to store up to 30,000 AF in the AVEK's groundwater basin, with a dry-year return capability of <br /> 10,000 AF. <br /> ■ Arvin-Edison Storage Program:The storage program is estimated to deliver 75,000 AF, and the <br /> specific amount of water MET can expect to store in and subsequently receive from the program <br /> depends on hydrologic conditions and any regulatory requirements restricting MET's ability to export <br /> water for storage. During wet years, MET has the discretion to use the program to store portions of its <br /> CITY OF SANTA ANA <br />