Central Valley Project Water Supply and Yield Study

The CALFED Bay-Delta Authorization Act, Title 1 of Public Law 108-361 (the Water Supply, Reliability, and Environmental Improvement Act of 2004) directed the Secretary of the Interior (Secretary), acting through the
Bureau of Reclamation (Reclamation), to conduct a study of available water supplies and existing and future needs for water in the State of California.

The Secretary is to prepare a report identifying possible projects and water management actions that could provide new firm yield and water supply improvements for the CVP. The Secretary is also required to incorporate and revise, as necessary, the results of the 1995 Least-Cost CVP Yield Increase Plan originally required by section 3408(j) of Central Valley Project Improvement Act (CVPIA) of 1992.

The purpose of this Water Supply and Yield (WSAY) Study is to identify the following:

1. Opportunities for new firm yield and water supply improvements for CVP water service contractors (entities with contracts for the delivery of CVP water)
2. Water management actions or projects that would improve firm yield for the CVP while balancing the available supplies with existing demands
3. The financial costs of the water management actions or projects
4. Beneficiaries and beneficiaries’ willingness to pay for identified improvements