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Surface Storage Investigations

Shasta Lake Water Resources Investigation
Shasta Lake Reservoir Area

The Shasta investigation reflects a new era approach to surface storage planning by prioritizing improvements for Sacramento River salmon and other restoration actions while also providing improved reliability for water users.

U.S. Bureau of Reclamation is working in partnership with local agencies to investigate the enlargement of Shasta Dam and Reservoir to increase the cold water available for maintaining lower Sacramento River temperatures and improve water supply reliability for other beneficial uses.

Raising Shasta Dam 6.5 feet would inundate up to an estimated additional 1,420 lineal feet of the lower McCloud River. For a dam raise of 18.5 feet, up to an estimated additional 3,480 feet of the lower McCloud River would be inundated. The McCloud River is an area of specific interest. California Public Resources Code 5093.542(c) restricts state participation in studies to enlarge Shasta Dam and Reservoir if that action could have an adverse effect on the free-flowing conditions of the McCloud River or its wild trout fisheries. The Investigation and other federal agencies, are studying project alternatives, project benefits, potential adverse effects, and mitigation strategies.

DWR has stopped work on the Shasta Lake Water Resources Investigation since July 2005 due to lack of funding. U.S. Bureau of Reclamation is the federal lead agency for the project and is preparing an environmental impact statement and a feasibility study report.

Planning Objectives

  • Increase water supplies and water supply reliability for agricultural, M&I, and environmental purposes
  • Increase survival of anadromous fish populations in the upper Sacramento River
  • To the extent possible, Shasta Lake enlargement will include opportunities to help restore ecosystem in the Shasta Lake area and along the upper Sacramento River, reduce flood damages along the Sacramento River, develop additional hydropower capabilities at Shasta Dam, and increase recreational opportunities at Shasta Lake.


  • U.S. Bureau of Reclamation has completed a draft feasibility report and a draft environmental impact statement.


  • Completed reservoir area mapping and initial hydrologic studies
  • Completed plan formulation strategy
  • Completed field surveys and baseline for Habitat Evaluation Procedures

The following documents have been completed:

Please see the U.S. Bureau of U.S. Bureau of Reclamation website for additional information and a copy of these documents.



To submit comments or questions, please contact Katrina Chow, U.S. Bureau of Reclamation Project Manager