It may seem like this report has been published before (8 November 2019). That's true, but CRS reports are periodically updated and the Central Valley report can't escape.
So Charles V. Stern and Pervaze A. Sheikh just (25 November 2019) updated it: 'Central Valley Project: Issues and Legislation'.
Download CRS_CVP_Issues_Legislation_25Nov2019
Summary
The Central Valley Project (CVP), a federal water project owned and operated by the U.S. Bureau of Reclamation (Reclamation), is one of the world’s largest water supply projects. The CVP covers approximately 400 miles in California, from Redding to Bakersfield, and draws from two large river basins: the Sacramento and the San Joaquin. It is composed of 20 dams and reservoirs and numerous pieces of water storage and conveyance infrastructure. In an average year, the CVP delivers more than 7 million acre-feet of water to support irrigated agriculture, municipalities, and fish and wildlife needs, among other purposes. About 75% of CVP water is used for agricultural irrigation, including 7 of California’s top 10 agricultural counties. The CVP is operated jointly with the State Water Project (SWP), which provides much of its water to municipal users in Southern California.
CVP water is delivered to users that have contracts with Reclamation. These contractors receive varying levels of priority for water deliveries based on several factors, including hydrology, water rights, prior agreements with Reclamation, and regulatory requirements. The Sacramento and San Joaquin Rivers’ confluence with the San Francisco Bay (Bay-Delta or Delta) is a hub for CVP water deliveries; many CVP contractors south of the Delta receive water that is “exported” from north of the Delta.
Development of the CVP resulted in significant changes to the area’s natural hydrology. However, construction of most CVP facilities predated major federal natural resources and environmental protection laws. Much of the current debate related to the CVP revolves around how to deal with changes to the hydrologic system that were not significantly mitigated for when the project was constructed. Thus, multiple ongoing efforts to protect species and restore habitat have been authorized and are incorporated into project operations.
Congress has engaged in CVP issues through oversight and at times legislation, including provisions in the 2016 Water Infrastructure Improvements for the Nation (WIIN Act; P.L. 114-322) that, among other things, authorized changes to operations in an attempt to provide for delivery of more water under certain circumstances. Although some stakeholders are interested in further operational changes to enhance CVP water deliveries, others are focused on the environmental impacts of operations.
Various state and federal proposals are currently under consideration and have generated controversy for their potential to affect CVP operations and allocations. In late 2018, the State of California finalized revisions to its Bay-Delta Water Quality Control Plan. These changes would require that more flows from the San Joaquin and Sacramento Rivers reach the Bay-Delta for water quality and fish and wildlife enhancement (and thus would further restrict water supplies for other users). The Trump Administration generally has opposed these changes. At the same time, the Trump Administration is pursuing efforts to increase CVP water supplies for users, including reconsultation on long-term operations of the CVP under the Endangered Species Act (ESA; 87 Stat. 884. 16 U.S.C. §§1531-1544). The state has opposed these efforts. Efforts to add or supplement CVP storage and conveyance also are being considered and are under study by federal and state entities.
In the 116th Congress, legislators may consider bills and conduct oversight on efforts to increase CVP water exports compared to current baselines. Congress is considering whether to approve funding for new water storage projects, and it also may consider legislation to extend or amend previously enacted CVP authorities (e.g., WIIN Act authorities that are expiring or have exceeded their appropriations ceiling).
Introduction
The Bureau of Reclamation (Reclamation), part of the Department of the Interior (DOI), operates the multipurpose federal Central Valley Project (CVP) in California, one of the world’s largest water storage and conveyance systems. The CVP runs approximately 400 miles in California, from Redding to Bakersfield (Figure 1). It supplies water to hundreds of thousands of acres of irrigated agriculture throughout the state, including some of the most valuable cropland in the country. It also provides water to selected state and federal wildlife refuges, as well as to some municipal and industrial (M&I) water users.
This report provides information on hydrologic conditions in California and their impact on state and federal water management, with a focus on deliveries related to the federal CVP. It also summarizes selected issues for Congress related to the CVP.
Recent Developments
The drought of 2012-2016, widely considered to be among California’s most severe droughts in recent history, resulted in major reductions to CVP contractor allocations and economic and environmental impacts throughout the state.1 These impacts were of interest to Congress, which oversees federal operation of the CVP. Although the drought ended with the wet winter of 2017, many of the water supply controversies associated with the CVP predated those water shortages and remain unresolved. Absent major changes to existing hydrologic, legislative, and regulatory baselines, most agree that at least some water users are likely to face ongoing constraints to their water supplies. Due to the limited water supplies available, proposed changes to the current operations and allocation system are controversial.
As a result of the scarcity of water in the West and the importance of federal water infrastructure to the region, western water issues are regularly of interest to many lawmakers. Legislation enacted in the 114th Congress (Title II of the Water Infrastructure Improvements for the Nation [WIIN] Act; P.L. 114-322) included several CVP-related sections.2 These provisions directed pumping to “maximize” water supplies for the CVP (including pumping or “exports” to CVP water users south of the Sacramento and San Joaquin Rivers’ confluence with the San Francisco Bay, known as the Bay-Delta or Delta) in accordance with applicable biological opinions (BiOps) for project operations.3 They also allowed for increased pumping during certain storm events generating high flows, authorized actions to facilitate water transfers, and established a new standard for measuring the effects of water operations on species. In addition to operational provisions, the WIIN Act authorized funding for construction of new federal and nonfederal water storage projects. CVP projects are among the most likely recipients of this funding.
Due to increased precipitation and disagreements with the state, among other factors, the WIIN Act’s CVP operational authorities did not yield significant new water exports south of the Delta in 2017 and 2018. However, the authorities may be more significant in years of limited precipitation and thus may yield increased supplies in the future. Although use of the new operational authorities was limited, Reclamation received funding for WIIN Act-authorized water storage project design and construction in FY2017-FY2019; a significant amount of this funding has gone to CVP-related projects.
Several state and federal proposals are also currently under consideration and have generated controversy for their potential to significantly alter CVP operations. In mid-2018, the State of California proposed revisions to its Bay-Delta Water Quality Control Plan. These changes would require that more flows from the San Joaquin and Sacramento Rivers reach the California Bay- Delta for water quality and fish and wildlife enhancement (and would thus further restrict water supplies for other users). At the same time, the Trump Administration is exploring options to increase CVP water supplies for users, including new operational protocols under the Endangered Species Act (ESA; 87 Stat. 884. 16 U.S.C. §§1531-1544).
I'll await the next update.
Enjoy!
"What’s the use of having developed a science well enough to make predictions if, in the end, all we’re willing to do is stand around and wait for them to come true?" - F. Sherwood Rowland
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