Mirabel Dam Modifications for Improved Fish Passage

Salmonid Habitat Restoration and Acquisition

Fish Passage Improvement Fish Screening
Project ID724023
Recovery DomainsN Central California Coast
Start Date06/01/2013
End Date11/14/2016
Year2012
StatusCompleted
Last Edited05/08/2024
 
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Description    


This project modified an existing water diversion structure (Mirabel Inflatable Dam) to improve fish passage. The project improved attractive flows to a new fish passage structure, eliminating delays in fish passage due to sub-optimal flow conditions, unattractive flow conditions over the Dam and eliminated the need to alter Dam inflation to accommodate fish passage. This project addressed the above goal by installing a new vertical slot fish ladder and fish screen that provides an attractive flow of 65 cubic feet per second (cfs), which is much greater than the previous 25 cfs through the former right bank Denil ladder. Additional attractive flows within the pump intake structure are shunted to the bottom of the ladder for additional attractive flows at approximately 135 cfs. This project improved access for coho salmon to an estimated 462.3 miles of anadromous habitat in the Russian River basin. Upon review, the reported proposed miles made accessible were found to be based a hydrologic layer, which likely exaggerated the miles of anadromous distribution above the dam. The actual miles reported are likely a minimum estimate, but are based on recognized steelhead distribution above the dam.

Project Benefit    


Improve fish passage.

Accomplishments

Metric Completed Originally
Proposed
Fish Passage
  Barriers Removed
  Miles Opened 462.30 2,045.00

Funding Details

SourceFunds
PCSRF$75,214
State$1,107,924
Other$3,942,872
Report Total:$5,126,010


Project Map



Worksites

7210513    


  • Worksite Identifier: 7210513
  • Start Date:
  • End Date:
Area Description
Mirabel Dam - fish passage modifications

Location Information

  • Basin: Northern California Coastal (180101)
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: California
  • Recovery Domain: N Central California Coast
  • Latitude: 38.500091
  • Longitude: -122.886149

ESU

  • California Coastal Chinook Salmon ESU
  • California Coastal Chinook Salmon ESU
  • Central California Coast Coho Salmon ESU
  • Central California Coast Coho Salmon ESU
  • Central California Coast Steelhead DPS
  • Central California Coast Steelhead DPS

Map

Photos

Metrics

Metrics
  • C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)
    •      . . C.0.a Habitat restoration and acquisition funding 5,126,010.00
    •      . . C.0.b Length of stream treated/protected .04
    •      . . C.0.c
      Project identified in a Plan or Watershed Assessment
      CDFG, 2004, Recovery Strategy for California Coho Salmon, CDFG, Sacramento, CA
    •      . . C.0.d.1 Project Monitoring (LOV)
    •      . . C.0.d.2 Monitoring Location (LOV)
    •      . . C.1 Fish Screening ProjectY (Y/N)
      •      . . . . C.1.a Fish screen funding 2,563,005.00
      •      . . . . C.1.d.1 Fish screens replaced or modifiedY (Y/N)
        •      . . . . . . C.1.d.2 Number of fish screens replaced or modified 1
      •      . . C.2 Fish Passage ImprovementY (Y/N)
        •      . . . . C.2.a Fish Passage Funding 2,563,005.00
        •      . . . . C.2.b.1 Length of stream made accessible 462.30
        •      . . . . C.2.b.3 Type of blockage/barrier (LOV)
        •      . . . . C.2.b.4 Number of blockages/impediments/barriers impeding passage 1
        •      . . . . C.2.e.1 Fish ladder installed/improvedY (Y/N)
          •      . . . . . . C.2.e.2 Number of fish ladders installed/improved 1