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Salton Sea Ecosystem Restoration Program

Department of Water Resources
Colorado River and Salton Sea Office
1416 9th Street
Sacramento, CA 95814

Mailing Address:
P.O. Box 942836
Sacramento, CA 94236-0001

Phone Number:
916-653-8629

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 Salton Sea Ecosystem Restoration Program

New On January 24, 2008, the Legislative Analysis Office released the report Restoring the Salton Sea. The report discusses the history and current state of the Sea and legal and policy reasons for restoring the Sea. The report also makes recommendations on how the legislature should proceed with the restoration.

The Salton Sea Ecosystem Restoration Program's Final Programmatic Environmental Impact Report (FPEIR) and Certification are now available. The FPEIR includes a description of the Preferred Alternative, all of the comments received during the 90-day review period, and responses to those comments.


The Secretary for Resources has provided to the Legislature, in accordance with Fish and Game Code 2081.7, the Salton Sea Ecosystem Restoration Program Preferred Alternative Report and Funding Plan, and Ecosystem Restoration Study. The Salton Sea Ecosystem Restoration Program Preferred Alternative (PDF: 6MB) is now available. The Ecosystem Restoration Study is Appendix H of the Draft Programmatic Environmental Impact Report.


On October 19, 2006, the Resources Agency released the Salton Sea Ecosystem Restoration Draft Programmatic Environmental Impact Report (PEIR). The 90-day public review period ended on January 16, 2007.

Program Objective

On behalf of the California Resources Agency, the Department of Water Resources (DWR) and the Department of Fish and Game (DFG) are preparing a restoration plan for the Salton Sea ecosystem, and an accompanying Environmental Impact Report (EIR). As part of this effort, which is based on State legislation enacted in 2003 and 2004 (SB 277, SB 317, SB 654 and SB 1214), DWR and DFG are developing a preferred alternative for the restoration of the Salton Sea ecosystem and the protection of wildlife dependent on that ecosystem. The Salton Sea Ecosystem Restoration Plan, Programmatic Environmental Impact Report (EIR) and a proposed funding plan are expected to be completed in late April of 2007 and subsequently submitted to the Legislature.

The Resources Agency has initiated an objective and transparent process that includes broad public involvement in the development of the Ecosystem Restoration Plan and Programmatic EIR. This process is intended to provide balanced representation of the numerous stakeholders with interest in restoration of the Salton Sea. As provided in the legislation, the Secretary for Resources has established an Advisory Committee to provide recommendations to assist in the preparation of the Ecosystem Restoration Plan, including consultation throughout all stages of the alternative selection process.

Salton Sea Background

The Salton Sea is located in a closed desert basin in Riverside and Imperial Counties in southern California, south of Indio and north of El Centro. The basin is more than 200 feet below sea level and has no natural outlet. Although lakes have existed in this basin in the past, the current body of water formed in 1905 when a levee break along the Colorado River caused its flows to enter the basin for about 18 months. Since 1905, the Sea has fluctuated in size with varying inflow, and it today has a surface area of about 365 square miles.

A balance between inflowing water and evaporation sustains the Sea. With no outlet, any salts that are dissolved in the inflow are trapped. Salt concentrations in the Sea are currently about 48,000 milligrams per liter (mg/L), or about 30 percent higher than ocean water. Salinity will continue to rise under current conditions, however, under the recently approved Quantification Settlement Agreement inflow to the Sea will be will be significantly reduced. The reduction in inflow will cause the Sea to shrink and cause salinity to rise faster than it would have without a reduction in inflow.

A gradual increase in salinity and its consequences was recognized soon after the Sea was formed. Various salinity control measures were studied as early as the mid-1950s. Since then, many alternatives have been proposed and analyzed. The current effort by the California Resources Agency is the latest attempt to develop a permanent solution to continued degradation of the environmental values of the Sea.

Site Information

Please use below listing of topics for this site, or the navigation menu at left.

Brief History

  • The sea is a terminal desert lake, or sink. The present sea is only the latest in a succession of waterbodies occupying the Salton Sink.
  • The sink was once part of the Gulf of California. As the Colorado River and its tributaries carved out the Grand Canyon, enormous quantities of sediment were carried downstream eventually creating a drainage divide that cut off the Salton Sink from the gulf.
  • The Colorado River periodically alternated its flow between the sink and the gulf following creation of the drainage divide.
  • The present sea was formed in 1905 when Colorado River flood flows breached a levee and flowed into the then-dry Salton Sink.
  • For more...

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