Stanislaus Power Tunnel Fish Screen

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Stanislaus Power Tunnel Fish Screen Project

The Project is located on the Middle Fork of the Stanislaus River, the county line between Calaveras and Tuolumne Counties, about 22 miles east of Angels Camp, California and roughly five miles downstream of Beardsley Reservoir.

The Sand Bar Dam and Stanislaus Intake and Power Tunnel are part of the Spring Gap-Stanislaus Project, FERC No. 2130-033. The Sand Bar Dam facilities reside on lands within the Stanislaus National Forest managed by the U.S. Forest Service (USFS). The Project site is at approximate elevation 2,750 feet (USGS NGVD29).

The FERC relicensing of the Spring Gap-Stanislaus Project contains conditions to protect and enhance fish, wildlife, water quality, recreation, and cultural resources. This includes the installation of new self-cleaning fish screens and a permanent bypass at the entrance to the existing 11-mile power tunnel. The bypass will regulate instream releases for conveying fish, debris, and sediment from the intake to the receiving tailwater pool. The Project also includes constructing a control building for housing electrical/control equipment necessary to monitor, automate, and maintain the fish screened intake.

The isolated location of the Project poses a number of unique challenges including:

  • Work within river,
  • Installation of a water-filled bladder cofferdam system,
  • Dewatering and bypass pumping around the project site,
  • Earthwork, grading, and placement of concrete structures downstream of the cofferdam,
  • Startup of mechanical pumps and piping, and
  • Facility testing and startup.
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Folsom, CA 95630-3223
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