Red Bluff Diversion Dam

Red Bluff Diversion Dam


The Tehama-Colusa Canal Authority required a 500 cfs (323 MGD; 50,970 m3/h) emergency pumping plant to supply water to its irrigators after use of a major diversion dam was restricted due to permitting issues involving state and federally protected Chinook and Coho Salmon, Steelhead, and Sturgeon. The emergency pumping plant required 1,500 ft2 (139 m2) of screens screen surface area to meet the 0.33 fps (10 cm/s) approach velocity requirement with only 3 feet (0.9 m) of water depth available. The diversion also needed to be designed, fabricated, and installed in less than four months.

The final project used a piled structure to support 10 shallow intake plenums, the pump columns, and the cone screens. The cone screens system included 10 C168-48HA screens, each measuring 14 feet (4.3m) in diameter and 4-feet (1.2 m) high and equipped with a hydraulic drive brush cleaning system to meet the project needs.

Benefit of ISI System

ISI worked with the client's engineering firm, the pump manufacturer, and the fisheries agencies to develop a design-build solution that went from design to installation in less than 3 months and without interruption to operations. ISI's conical shaped screen enabled this shallow water diversion to meet fish protection criteria by placing a large screen surface area in a relatively small project footprint.


Tehama-Colusa Canal Authority


CH2M Hill

General Contractor:

Galindo Construction Corporation and Rain for Rent


Sacramento River, Red Bluff, CA

Year Installed:


Slot Size:

1.75 mm

Screen Model:


Drive System:




Water Body:


Flow Rate:

500 cfs (323 MGD; 50,970 m3/h)

Screen Type:

Cone Screens (conical)

Retrieval Systems:

Fixed Flange Connection

Number of Screens:


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