B.1 Background
An urban water supplier that anticipates participating in or receiving water from a proposed project (covered action) in the Sacramento-San Joaquin Delta (Delta) should provide information that can be used to demonstrate consistency with the Delta Plan Policy WR P1, Reduce Reliance on the Delta Through Improved Regional Water Self-Reliance . A covered action includes projects such as a multi-year water transfer, conveyance facility, or new diversion that involves transferring water through, exporting water from, or using water in the Delta. This appendix provides the analysis and documentation to demonstrate Irvine Ranch Water District’s (IRWD) improved regional self-reliance and measurable reduction in reliance on Delta water supplies. Specific elements in this appendix include: Background: Delta Reform Act reduced reliance policy and overview of the Delta Plan and Policy WR P1; and IRWD’s documentation and quantification of supplies contributing to reduced reliance on the Delta watershed and improved regional self-reliance and consistency with the Delta Plan Policy WR P1.
B.1.1 Sacramento-San Joaquin Delta Reform Act and Delta Plan Policy WR P1
In 2009 the State Legislature passed a comprehensive legislation package, the Sacramento-San Joaquin Delta Reform Act (Delta Reform Act), which established coequal goals for the Delta of providing a more reliable water supply for California and protecting, restoring, and enhancing the Delta ecosystem. IRWD worked closely with a coalition of water agencies to develop and enact this historic legislation. The Delta Reform Act includes a policy (WR P1) to reduce reliance on the Delta in meeting California’s future water supply needs through a statewide strategy of investing in improved regional supplies, conservation and water use efficiency. The Delta Reform Act also created the Delta Stewardship Council (DSC), which is tasked with furthering the state’s coequal goals for the Delta through the development of a Delta Plan. The Delta Plan is a comprehensive, long-term resource management plan for the Delta. The Delta Reform Act established a self-certification process for demonstrating consistency of covered actions with the Delta Plan. Public agencies proposing a covered action, must prepare a written certification of consistency with detailed findings as to whether the covered action is consistent with applicable Delta Plan policies and must submit the certification to the DSC.
Appendix B - 2
IRWD – 2025 Urban Water Management Plan – Reduced Delta Reliance
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