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Proposed Fish Screen Facility

Design and Structural Details. Proposed Fish Screen Facility. Objective Design Criteria Input for Design Fish Screen Schematic Summary. Objective. “Protection and Least Disturbance to Migrating Fish Species” Design Approach to Meet Objective -Low approach velocity

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Proposed Fish Screen Facility

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  1. Design and Structural Details Proposed Fish Screen Facility • Objective • Design Criteria • Input for Design • Fish Screen Schematic • Summary

  2. Objective • “Protection and Least Disturbance to Migrating Fish Species” • Design Approach to Meet Objective -Low approach velocity -Adequate cleaning system -Solution for sedimentation issues -Hydraulic and structural integrity -Good access -Reasonable operation and maintenance

  3. Design Criteria • Guidelines by NMFS and DFG • Biological Considerations • Hydrological and Hydraulic Requirements • Specific Criteria • Approach velocity 0.2 ft/s • Bar opening 0.0689” (1.75 mm) • Gross opening (27% of gross area) • Cleaning frequency of 5 minutes

  4. Design Criteria (cont) • Listed relevant criteria and sent out for review -DFG (Jim Starr) -Interior (Reclamation) -Consultants (CH2M Hill, Darryl Hayes) • Reviewed performance of existing fish screens Outcome--A set of design criteria

  5. Input for Design • Data - Capacity: 1500 cfs at low stage 2250 cfs at high stage - 100 Year flood stage - Tidal stage variations - Topography - Soil conditions and geotechnical information

  6. Fish Screen Schematic Plan

  7. Fish Screen Schematic Elevation

  8. Summary • Meets biological, hydraulic and hydrological criteria • Better control on approach velocity • More efficient cleaning • More reliable screens, less failure and damage • Better operation and maintenance • Feedback from members

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