The Anadromous Fish Restoration Program

Sacramento-San Joaquin Delta

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 0       0       0                  
WATERSHED STATISTICS ANADROMOUS HABITAT COORDINATORS
  Watershed area:   0 square miles
  Watershed Priority:  highest
  Total storage:  0 acre-feet
  Historic:    miles  
  Current:    miles  ( 0 %)
     Donald Ratcliff
RESTORATION
  Projected number of restoration projects:      Projected total cost of restoration:   $0.00
  Total invested to date:  AFRP    $0.00  other    $0.00

Documents

No Documents are available for this watershed.

Actions and Evaluations

Status Description
Not Addressed Supplemental Action Requiring Water 9. During May, maintain at least 13,000 cfs daily flow in the Sacramento River at the I Street Bridge and 9,000 cfs at Knights Landing to improve transport of eggs and larval striped bass and other young anadromous fish and to reduce egg settling and mortality at low flows. Sub-priorities: 1) 13,000 cfs at I Street Bridge, 2) 9,000 cfs at Knights Landing.
Not Addressed Supplemental Action Requiring Water 8. Increase the level of protection targeted by the May and June X2 requirements to a 1962 level of development (LOD), as described below, where the number of days when X2 is required at Chipps Island in Table A of the 1995 WQCP is shown to the right of the requirements to meet a 1962 LOD and where PMI is the previous months eight river index in acre feet.
Not Addressed Supplemental Action Requiring Water 7. When a barrier at the head of Old River is not operational, limit the combined SWP and CVP exports to 1,500 cfs or maintain a Vernalis inflow to total export ratio of 5 to 1 during the 30-day April through May pulse flow period.
Not Addressed Supplemental Action Requiring Water 6. In conjunction with operation of a barrier at the head of Old River and consistent with efforts to conduct evaluations 1 and 2, maximize the difference between flows and export rates at levels greater than those required under the Delta smelt biological opinion during the 30-day April and May pulse flow period.
Not Addressed Supplemental Action Requiring Water 14. When the DCC is closed during the November through January period, limit the average SWP and CVP exports to no greater than 35% of Delta inflow if Evaluation 3 determines that a relatively high ratio of export to inflow limits survival of juvenile chinook salmon migrating through the Sacramento River Delta. Sub-priorities: 1) January, 2) December, 3) November.
Not Addressed Supplemental Action Requiring Water 13. Supplement Delta outflow for migration and rearing of white sturgeon, green sturgeon, striped bass, and American shad by modifying CVP operations and using water available under the CVPIA (sections 3406(b)(2) and (3)), consistent with actions to protect chinook salmon and steelhead.
Not Addressed Supplemental Action Requiring Water 12. Limit the average SWP and CVP exports to no greater than 35% of Delta inflow in July. Sub-priorities: 1) July 1 to July 14, 2) July 16 to July 31.
Ongoing Supplemental Action Requiring Water 11. Close the DCC during the November through January period beyond the 45-day limit defined under Operational Target 1 should meeting one of the triggers stipulated in Operational Target 1 require additional closure.
Not Addressed Supplemental Action Requiring Water 10. During the last half of May, ramp (linearly) the total SWP and CVP export level from what it is at the end of the 30-day April and May pulse flow period to that export level proposed by the SWP and CVP to meet the requirements of the 1995 WQCP on June 1.
Ongoing Supplemental Action Not Requiring Water 16. Construct and operate a barrier at the head of Old River to improve conditions for chinook salmon migration and survival if Evaluation 1 determines that a barrier can be operated to improve conditions for salmon with minimal adverse effects on other Delta species.
Ongoing Supplemental Action Not Requiring Water 15. Implement actions to reduce losses of juvenile anadromous fish resulting from unscreened or inadequately screened diversions in the Sacramento-San Joaquin Delta and Suisun Marsh, if Evaluation 12 determines significant benefits to juvenile anadromous fish can be achieved by screening.
Not Addressed Operational Target 5. Minimize fish losses and predation at facilities by operating state and federal pumps interchangeably when this operation achieves a net benefit to anadromous fish production.
Not Addressed Operational Target 4. Maintain an average export to inflow ratio of no more than 45% during February in dry years by increasing the ratio to ~55% in early February and decreasing the ratio to ~35% in late February, when winter-run chinook salmon smolts are present.
Not Addressed Operational Target 3. Maximize DCC closure from May 21 through June 15 when chinook salmon and other anadromous species are abundant in the lower Sacramento River, but keep open when the net benefit to striped bass and other sensitive species in the lower San Joaquin River is great.
Not Addressed Operational Target 2. When the DCC is closed during the November through January period, limit the average SWP and CVP exports to no greater than 35% of Delta inflow if Evaluation 3 determines that a relatively high ratio of Delta export to inflow limits juvenile salmon survival through the Sacramento River Delta. Sub-priorities: 1) January, 2) December, 3) November.
Not Addressed Operational Target 1. Close Delta Cross Channel (DCC) up to 45 days in the November through January period, when juvenile salmon enter the Delta or flow or turbidity changes trigger salmon migration. The DCC gates are to be closed within 24 hours when any of the following triggers occur:1) daily average flow or turbidity of the Sacramento River at Freeport increases by 20% from the previous 3 day running average ;2) capture of at least one juvenile chinook salmon of spring-run size in the Sacramento River tributaries and in the Sutter Bypass, or in the Sacramento River at or below Knights Landing; 3) capture of at least two juvenile chinook salmon of any race in the Sacramento River at or below Knights Landing at any Interagency Ecological Program (IEP) sampling station in one day.The gate closure period will be for 10, 15 and 20 consecutive days in November, December and January, respectively, and will remain closed for another 10 consecutive days if any of the above triggers are met after the initial closure for that month.
Not Addressed E9. Continue to evaluate the effects of Delta hydraulic conditions such as net reverse flows on anadromous fish migration and distribution.
Not Addressed E8. Evaluate the benefits of short-term pulsed Delta inflows (five days or less) on the migration rate and survival of anadromous fish.
Not Addressed E7. Evaluate the benefit of and opportunities for new technologies to improve water quality and to guide migrating fish.
Not Addressed E6. Evaluate benefits of and opportunities for additional tidal shallow-water habitat as rearing habitat for anadromous fish in the Delta.
Not Addressed E5. Evaluate opportunities to provide modified operations and a new or improved control structure for the DCC and Georgiana Slough or other methods at those locations to assist in the successful migration of anadromous salmonids.
Not Addressed E4. Evaluate potential benefits of and opportunities for increasing salmonid and other anadromous fish production through improved riparian habitats in the Delta.
Not Addressed E3. Evaluate the effect of a low (~35%) versus a high (~65%) SWP and CVP export to Delta inflow ratio on the survival of coded-wire-tagged, late-fall-run chinook salmon smolts migrating through the Delta when the DCC is closed.
Not Addressed E2. Evaluate in conjunction with Evaluation 1 the impacts of San Joaquin River Delta inflow and SWP and CVP export rates on salmon smolt survival through the San Joaquin Delta. This evaluation is intended to be consistent with the proposed adaptive management plan for the San Joaquin River and Delta that is being considered by involved parties.
Not Addressed E13. Evaluate the potential effect of Delta export rate during the fall on the upstream migration of adult San Joaquin chinook salmon.
Not Addressed E12. Evaluate the benefits to juvenile anadromous fish of and opportunities for screening diversions and re-locating riparian diversions in the Delta and Suisun Marsh.
Not Addressed E11. Evaluate whether Delta inflow and export rates and other Delta hydrodynamic parameters effect juvenile salmon survival when the DCC is closed.
Not Addressed E10. Evaluate the potential effects of reductions in food chain organisms in the Delta and Suisun Bay on anadromous fish production.
Not Addressed E1. In conjunction with Evaluation 2, evaluate whether a temporary rock barrier at the head of Old River can be operated during the 30-day April through May pulse flow period to improve conditions for chinook salmon migration and survival with minimal adverse effects on other Delta species, consistent with the COE's permit (PN 199600027) to the CDWR and USFWS's Biological Opinion on delta smelt for the Temporary Barriers Project.

Photos

No photos available at this time.