About Us

Reclamation region's map with Interior Region 10 · California-Great Basin circled

Reclamation's Mission and Vision statements:

Interior Region 10 · California-Great Basin

Reclamation's Interior Region 10 · California-Great Basin is one of five Reclamation regions across the nation's 17 western states. It encompasses southern Oregon, northwestern Nevada and northern California down to Bakersfield.

The Interior Region 10 · California-Great Basin manages one of the nation's largest and best-known water projects, the Central Valley Project, as well as Oregon's Klamath Project; Nevada's Newlands, Humboldt, Washoe, and Truckee Storage projects; and California's Cachuma, Orland, Santa Maria, Solano, and Ventura River projects.

Our Locations

The Interior Region 10 · California-Great Basin was established in 1942 by the Secretary of the Interior and is headquartered in Sacramento, California. The Region also has six area offices: Klamath Basin, Northern California, Lahontan Basin, Central California, South-Central California, and Bay Delta.

Additionally, there are five field offices located at Weaverville, Calif., Lake Berryessa, New Melones Lake, C.W. Bill Jones Pumping Plants, and the Tracy Fish Test Facility. Two specialized offices also help comprise the Interior Region 10 · California-Great Basin, they are the Central Valley Operations Office and the Interior Region 10 · California-Great Basin Construction Office.

What We Do

The Region strives to develop and implement a balanced approach to water allocation, serving users while protecting the environment. The Region's goal is to balance competing needs among water uses and users. These include urban and industrial use, agriculture, fish and wildlife habitat, water quality, wetlands, endangered species issues, Native American Tribal Trust issues, power generation, and recreation.

Who We Are

Reclamation scientists examining fishThe Interior Region 10 · California-Great Basin currently employs about 1,000 people in a wide range of positions from park ranger to engineer to administrative assistant to fishery biologist. Project managers take the lead in negotiating contracts, implementing habitat improvements and furthering ongoing projects. Operations and maintenance personnel manage and maintain critical facilities in drought and flood conditions, monitor facilities instrumentation, perform preventive maintenance and oversee rehabilitation and repair projects. Support staff provides the design, engineering, construction, data processing, human resources, procurement, budget, and other services essential to getting the job done.

Key Projects and Facilities

Klamath Basin Area Office

  • The Klamath Project, which includes the Link River Dam, Upper Klamath Lake, Gerber Dam and reservoir, Clear Lake Dam and reservoir

Lahontan Basin Area Office

  • Newlands Project, which includes Lake Tahoe Dam; Lahontan Dam and powerplant; Carson River Diversion Dam; Derby Diversion Dam; Truckee Canal; "V" and "T" Canals
  • Washoe Project, which includes Stampede Dam, reservoir and powerplant; Prosser Creek Dam and reservoir; Derby Dam Fish Passage; Marble Bluff Dam and Pyramid Lake Fishway

Central Valley Project (CVP)

The CVP is one of the largest water storage and transport systems in the world, comprised of 20 reservoirs and more than 500 miles of canals. This project provides water used to irrigate more than 3 million acres of agricultural land and has a total reservoir storage of 11,363,000 acre-feet. Authorized purposes of the CVP include flood control, fish and wildlife, municipal and agricultural water supply, power generation, and recreation. Key reservoirs include:

  • Shasta Dam and Reservoir
  • Trinity Dam and Reservoir
  • New Melones Dam and Reservoir
  • Folsom Dam and Reservoir
  • Friant Dam and Millerton Reservoir
Last Updated: 11/4/20