Fish Passage Improvement Project at the Red Bluff Diversion Dam

6 Documents in Project


SCH Number
Lead Agency
Tehama Colusa Canal Authority
Document Title
Fish Passage Improvement Project at the Red Bluff Diversion Dam
Document Type
NOP - Notice of Preparation

Document Description
Construction of the Red Bluff Diversion Dam (RBDD) on the Sacramento River was completed in 1964 by the U.S. Bureau of Reclamation (USBR) as part of the Sacramento Canals unit of the Central Valley Project. The dam is used by the Tehama-Colusa Canal Authority (TCCA) as the primary point of diversion for 17 water districts in Tehama, Glenn, Colusa, and Yolo Counties. Since the dam's construction, concern has been expressed regarding the dam's effect on both upstream and downstream fish migration. The dam was built with 11 movable gates. Raising the gates eliminates the dams effect and allows the river to flow unimpeded. Lowering the dam gates allows for gravity diversion into the canals and results in the creation of Lake Red Bluff. Over the years, the dam gates have been raised more frequently in an attempt to enhance fish passage. Therefore, the ability to divert irrigation water has been gradually decreased from year-round to the current 4-months (gates-in) operations from May 15th to September 14th. During the remainder of the year the dam gates are open, allowing a free flowing, unimpeded river.

Contact Information
Arthur R. Bullock
Tehama Colusa Canal Authority
Lead/Public Agency
P.O. Box 1025
Willows, CA 95988

Phone : (530) 934-2125


Red Bluff Tehama

Notice of Completion

Review Period Start
Review Period End
Project Issues
Aesthetics Agriculture and Forestry Resources Economics/Jobs Fiscal Impacts Hydrology/Water Quality Land Use/Planning Recreation Wildlife
Reviewing Agencies
California Department of Fish and Wildlife, Northern and Eureka Region 1 (CDFW) California Department of Parks and Recreation California Native American Heritage Commission (NAHC) California Public Utilities Commission (CPUC) California State Lands Commission (SLC) Department of Water Resources Resources Agency State Water Resources Control Board, Division of Water Quality California Department of Transportation, District 2 (DOT) California Regional Water Quality Control Board, North Coast Region 1 (RWQCB)

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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