DWR Moves to Strengthen Protections for Fish, Improve Real-Time Management of State Water Project


San Joaquin Delta

An aerial photo of the San Joaquin Delta.

SACRAMENTO, Calif. – Moving to strengthen safeguards for fish and expand science-based decision making, the Department of Water Resources (DWR) took formal steps today to begin environmental review of long-term operations of the State Water Project (SWP).

The action enables California’s water project operations to avoid relying on proposed federal biological opinions announced last month to achieve environmental approval to operate consistent with state law. Instead, DWR will seek approval from the California Department of Fish and Wildlife (CDFW) to operate the SWP in a way that improves protections for fish and complies with the California Endangered Species Act (CESA).

In a key step toward that goal, DWR today issued a draft document prepared under the California Environmental Quality Act (CEQA) that identifies potential operational changes to protect species and manage the SWP based on real-time conditions in the Delta ecosystem, including additional flows dedicated to the environment.

DWR’s draft Environmental Impact Report (EIR) draws on a decade of science and a quantitative analysis of best-available data on flows, modeling, habitat and climate change impacts.

“This draft points to a more sophisticated and nimble way to manage the State Water Project to improve our ability to protect species and operate more flexibly. This is essential in order to capture water when it’s available and leave more water when and where fish need it,” said DWR Director Karla A. Nemeth.

The SWP captures and stores water that originates in the Sierra Nevada and delivers it to 27 million Californians in the Bay Area, Central California and Southern California.

DWR’s draft EIR is separate from the proposed biological opinions issued by federal agencies on October 22 for long-term operation of the federal CVP and the SWP. Earlier this year, out of concern for the scientific rigor of the federal process, DWR indicated it would pursue its own environmental review and permit process to ensure protection of endangered species under state law.


Concurrent with the environmental review under CEQA, DWR is developing an application for a permit from CDFW for long-term SWP operations under CESA. CDFW will determine requirements for the permit in the coming months, with a specific focus on mitigating impacts of SWP operations on longfin smelt, Delta smelt, winter-run and spring-run Chinook salmon.

The draft EIR assesses impacts of proposed project operations, a “no project” alternative that reflects current operating rules, three alternatives that provide fresh water flows in the spring and summer, and an alternative that uses physical barriers and other deterrents to keep fish away from the SWP pumps.

Historically, DWR had relied on federal Biological Opinions to cover the SWP under the federal ESA, with a consistency determination provided by CDFW. Securing a separate permit under CESA provides flexibility for CDFW to consider amendments to the permit based on better scientific understanding as part of the adaptive management program, without relying on changes to be made to the federal Biological Opinions. It also provides CESA authorization for SWP regardless of any potential changes in federal law.


DWR’s draft proposal differs from the federal Biological Opinions in several key ways:

  • It improves species protection by vesting authority in CDFW to stop operational changes if it determines they will violate CESA standards.
  • It includes multiple alternatives that provide a block of environmental water that can be used to offset pumping impacts in the Delta, with adjustments made over time as new information is learned.
  • It provides clear direction on when Delta pumping can be increased during storm events and caps the amount that exports can be increased in those events.
  • It includes updated modeling and quantitative analyses to support habitat actions in summer and fall to benefit Delta smelt.
  • It includes specific protections for longfin smelt, a protected species under CESA, and a commitment to implementing a longfin smelt science plan.
  • It does not seek to increase SWP exports

DWR anticipates completing a final document in early 2020, with a permit from CDFW expected to follow.


Media Contact:
Erin Mellon, Assistant Director, Public Affairs Office, Department of Water Resources
916-704-5529 | erin.mellon@water.ca.gov

*Updated December 17, 2019 to include links to the Incidental Take Permit Application and Appendices documents.

**The DEIR posted originally on November 21, 2019 contained an error in Figure 4.4—50.  The DEIR posted on December 9, 2019, includes the corrected figure. The Incidental Take Permit Application and Appendices were added December 17, 2019.


+ Draft Environmental Impact Report for Long-Term Operation of the California State Water Project

+ Draft Environmental Impact Report for Long-Term Operation of the California State Water Project Volume 2: Appendices


+ Incidental Take Permit Application for Long-Term Operation of the California State Water Project


+ Incidental Take Permit Application for Long-Term Operation of the California State Water Project: Appendices


+DWR Responses to CDFW Information Requests


+ View Public Comments



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