The Anadromous Fish Restoration Program

Mokelumne 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 4,680       9,300       8,024       3,344       71.5      
WATERSHED STATISTICS ANADROMOUS HABITAT COORDINATORS
  Watershed area:   661 square miles
  Watershed Priority:  not designated
  Total storage:  867,000 acre-feet
  Historic:   69 miles  
  Current:   46 miles  ( 66.7 %)
     Mike Healey
     Donald Ratcliff
STATUS
EBMUD, DFG and USFWS continue to collaboratively work to improve conditions for the Lower Mokelumne River. Spawning gravel augmentation, side channel reconnection, riparian and educational projects have been undertaken. Woodbridge Irrigation District has completed the rebuilding of the dam at Woodbridge with improved fish passage facilities.
RESTORATION
  Projected number of restoration projects:   6   Projected total cost of restoration:   $23,000,000.00
  Total invested to date:  AFRP    $99,582.00  other    $2,500,000.00

Actions and Evaluations

Status Description
Ongoing A3. Reduce and control flow fluctuations to avoid and minimize adverse effects to juvenile salmonids.
Ongoing A1. Supplement flows with water acquired from willing sellers consistent with applicable guidelines or negotiate agreements to improve conditions for all life history stages of chinook salmon and steelhead.
Not Addressed E4. Evaluate the effects of extending the closure of the fishing season from 31 December to 31 March (and possibly to 1 June) to protect juvenile salmonids and adult steelhead and prevent anglers from wading on redds.
Not Addressed E3. Evaluate the incidence of predation on juvenile salmonids emigrating past Woodbridge Dam, and investigate potential remedial actions if necessary.
Ongoing E2. Evaluate and facilitate passage of spawning adult salmonids in the fall and juvenile salmonids in the spring past Woodbridge Irrigation District Diversion Dam and Lodi Lake.
Not Addressed E1. Evaluate the effectiveness of pulse flows to facilitate successful emigration of juvenile salmonids in the spring, and determine the efficacy in all water year types.
Not Addressed A9. Eliminate or restrict gravel mining operations in the Mokelumne River flood plain to prevent damage to potential spawning areas and encroachment of vegetation.
Ongoing A8. Establish and enforce water quality standards to provide optimal water quality for all life history stages of salmonids.
Ongoing A7. Enhance and maintain the riparian corridor to improve streambank and channel rearing habitat for juvenile salmonids.
Not Addressed A6. Maintain suitable water temperatures for all salmonid life stages.
Not Addressed A5. Screen all diversions to protect all life history stages of anadromous fish.
Not Addressed A4. Reduce and control flow fluctuations to avoid and minimize adverse effects to juvenile salmonids.
Ongoing A3. Cleanse spawning gravel of fine sediments and prevent sedimentation of spawning gravel.
Ongoing A2. Replenish gravel suitable for salmonid spawning habitat.
Not Addressed A1. Supplement flows with water acquired from willing sellers consistent with applicable guidelines or negotiate agreements to improve conditions for all life history stages of chinook salmon and steelhead.

Photos

Aerial photo of Mokelumne near Camanche Dam Confluence of the Mokelumne and San Joaquin aerial Mokelumne gravel Mokelumne gravel Riffle