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PACIFIC SOUTHWEST REGION: Fish Screen Improves Fish Passage on the San Joaquin River
California-Nevada Offices , November 29, 2011
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The new fish screen and intake facility, shown in this aerial photo, has a diversion capacity of 195 cubic feet-per-second and replaced an existing unscreened facility of the same size.
The new fish screen and intake facility, shown in this aerial photo, has a diversion capacity of 195 cubic feet-per-second and replaced an existing unscreened facility of the same size. - Photo Credit: Patterson Irrigation District

By Dan Meier, Anadromous Fish Screen Program Manager

Patterson Irrigation District held a dedication ceremony to celebrate the completion of a state-of-the-art fish screen and intake facility located on the San Joaquin River in California, September 29.

The facility is located approximately 3 miles east of the city of Patterson. This new fish screen and intake facility has a diversion capacity of 195 cubic feet per second and replaced an existing unscreened facility of the same size.

Patterson Irrigation District is an agricultural water provider serving over 13,000 acres in the San Joaquin Valley. The San Joaquin River is a major river that serves as a critical migration route for Chinook salmon and Central Valley steelhead which migrate to the ocean as young fish and then return in subsequent years as adults.

The new fish screen facility is approximately 144 feet long and 30 feet high. It contains ten separate 5-feet-6-inch high by 11-feet-6-inch wide stainless steel profile-bar fish screens with openings of about a sixteenth of an inch.

The screen openings allow water flow to irrigation pumps while keeping fish out and allowing them to safely pass by the water diversion.

Funding for the project was provided by federal and state agencies and the Patterson Irrigation District. Approximately 50 percent of the funding was provided by the Anadromous Fish Screen Program (AFSP), a federal program jointly implemented by the U. S. Fish and Wildlife Service and Bureau of Reclamation.

Patterson Irrigation District is responsible for the annual operation and maintenance of the fish screens. This project represents a successful collaborative effort that results in improved fish passage on San Joaquin River without interrupting irrigation water deliveries or interfering with fish migrations during the project construction.


Contact Info: Jon Myatt, 916-414-6474, jon_myatt@fws.gov



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