The Anadromous Fish Restoration Program

Cosumnes River

map of watershed showing location of dams and major roads

Watershed Information


PRODUCTION
Species 1967-1991 Baseline Target 1992-2009 Average Increase Percent Change
fall-run Chinook salmon 1,660       3,300       802       -858       -51.7      
WATERSHED STATISTICS ANADROMOUS HABITAT COORDINATORS
  Watershed area:   740 square miles
  Watershed Priority:  not designated
  Total storage:  40,000 acre-feet
  Historic:   34 miles  
  Current:   34 miles  ( 100 %)
     Donald Ratcliff
     Mike Healey
STATUS
AFRP, working with the Fishery Foundation of California completed a rebuild of the south fish ladder of Granlees Dam, completed a gravel augmentation project to reconfigure channel and placed gravel for long-term recruitment.
RESTORATION
  Projected number of restoration projects:   >10   Projected total cost of restoration:   $20,000,000.00
  Total invested to date:  AFRP    $464,000.00  other    $8,300,000.00

Actions and Evaluations

Status Description
Ongoing E3. Evaluate the feasibility of restoring and increasing available spawning and rearing habitat for salmonids.
Complete E2. Evaluate and facilitate passage of adult and juvenile salmonids at existing diversion dams and barriers.
Ongoing E1. Determine and evaluate instream flow requirements that ensure adequate flows for all life stages of all salmonids.
Not Addressed A6. Rehabilitate damaged areas and remedy incompatible land practices to reduce sedimentation and instream water temperatures.
Not Addressed A5. Establish a riparian corridor protection zone. (10 projects at ≈ $500,000 each over 10 year period).
Not Addressed A4. Screen all diversions to protect all life history stages of anadromous fish.
A3. Enforce Fish and Game Codes that prohibit construction of unlicensed dams.
A2. Pursue opportunities to purchase existing water rights from willing sellers consistent with applicable guidelines to ensure adequate flows for all life stages of salmonids.
A1. Acquire water from willing sellers consistent with applicable guidelines or negotiate agreements to reduce water diversions or augment instream flows during critical periods for salmonids.

Photos

Blodget Consumnes Floodplain - unflooded Cosumnes Floodplain - flooded Cosumnes Floodplain - flooded Cosumnes Floodplain - flooded Cosumnes River Preserve Floodplain Gourndwater schematic