Post on 27-Mar-2015
Investigate Re-establishing Investigate Re-establishing Anadromous Fish Anadromous Fish
Populations Above Man-Populations Above Man-made Barriersmade Barriers
Oregon Department of Fish Oregon Department of Fish and Wildlifeand Wildlife
Willamette Basin
Barriers in the Willamette BasinBarriers in the Willamette Basin
Detroit Dam - North SantiamFoster Dam - South Santiam
Cougar Dam - McKenzie Dexter Dam - MF Willamette
Dam Impacts on Anadromous Dam Impacts on Anadromous FishFish
Santiam: loss of production above Santiam: loss of production above Detroit Dam (71%)Detroit Dam (71%)
MF Willamette: 80% habitat MF Willamette: 80% habitat blockedblocked
McKenzie: loss of productive McKenzie: loss of productive habitat above Cougar Dam (25 habitat above Cougar Dam (25 miles)miles)
Project GoalProject Goal
Investigate, experimentally stock, Investigate, experimentally stock, monitor, and evaluate the re-monitor, and evaluate the re-establishment of spring chinook establishment of spring chinook and winter steelhead above man-and winter steelhead above man-made dams in the Willamette made dams in the Willamette Basin without current fish passage Basin without current fish passage or with passage that impedes fish or with passage that impedes fish production.production.
Project ObjectivesProject Objectives
Quantify habitatQuantify habitat– Select sitesSelect sites
Plan prioritiesPlan priorities CoordinateCoordinate
– AgenciesAgencies– Permitting + NEPAPermitting + NEPA
Trap and HaulTrap and Haul– Adults Adults – Juveniles (hatchery)Juveniles (hatchery)
Project ObjectivesProject Objectives
Monitor recruitmentMonitor recruitment– snorkel surveyssnorkel surveys– spawning surveysspawning surveys
Migrant trappingMigrant trapping– screw trapsscrew traps
EstimatesEstimates– survivalsurvival– passagepassage– abundanceabundance
Anticipated ResultsAnticipated Results
Restore listed stocks above barriersRestore listed stocks above barriers Enhance overall natural production Enhance overall natural production Link populationsLink populations Provide forage for Bull TroutProvide forage for Bull Trout Enhance fisheriesEnhance fisheries Obtain survival information at damsObtain survival information at dams Provide nutrient enrichmentProvide nutrient enrichment
Rationale and Significance Rationale and Significance to Regional Programsto Regional Programs
Willamette Hatchery BiOpWillamette Hatchery BiOp Willamette Basin Operational Plan Willamette Basin Operational Plan
(The Oregon Plan) (The Oregon Plan) NMFS BiOp NMFS BiOp ODFW - OAR 635-500, WFMP ODFW - OAR 635-500, WFMP Subbasin SummarySubbasin Summary
Project RelationshipsProject Relationships
Bull T routPopulation +
HabitatSurveys (BPA)
Cougar W aterTem perature
Control Project(CORPS)
W illam etteBasin Habitat
M itigation(BPA)
Re-establishAnadrom ousFish above
Barriers
Willamette Basin Reservoirs - Willamette Basin Reservoirs - Current Chinook ReleasesCurrent Chinook Releases McKenzie BasinMcKenzie Basin
• Cougar (J+A)Cougar (J+A) North SantiamNorth Santiam
• Detroit (J+A)Detroit (J+A)• Big Cliff (J+A)Big Cliff (J+A)
South SantiamSouth Santiam• Foster (A)Foster (A)
MF WillametteMF Willamette• Fall Creek (J+A)Fall Creek (J+A)• Dexter (J+A)Dexter (J+A)• Lookout Point (J+A)Lookout Point (J+A)• Hills Creek (J+A)Hills Creek (J+A)
Hatchery Adult ReleasesHatchery Adult ReleasesFoster ReservoirFoster Reservoir (South Santiam)(South Santiam)
Year Male Female Jack Total
1996 121 98 5 224
1997 230 170 31 431
1998 374 318 7 699
1999 287 227 3 517
2000 367 237 7 611
2001 669 279 32 980
No current monitoring of juvenile migrants
Detroit Reservoir and DamDetroit Reservoir and Dam (North Santiam)(North Santiam)
Juveniles released Juveniles released in summer 2000in summer 2000
Adults released in Adults released in fall 2000fall 2000
Snorkel SurveysSnorkel Surveys• Breitenbush River:Breitenbush River:
97 fish/mile97 fish/mile• North Santiam North Santiam
River:River:
466 fish/mile466 fish/mile
0
100
200
300
400
500
600
trap
ped
dea
d
mar
ked
un
mar
ked
Screw Trap Results
Substantial number of naturally-produced smolts exited the reservoir
2001
Cougar DamCougar Dam (McKenzie River)(McKenzie River)
Migrant Monitoring (1998 - Migrant Monitoring (1998 - 2000)2000)
Adult releases from Adult releases from 1993 - 20011993 - 2001
Juvenile passage Juvenile passage during winter during winter drawdowndrawdown
Turbine mortalityTurbine mortality– 7.1 - 18.1%7.1 - 18.1%
Regulating outlet Regulating outlet mortalitymortality– 32.3%32.3%
02,000
4,0006,0008,000
10,00012,000
14,000
Turb
ines
Reg
Outl
et
1998-19991999-2000
Potential Release SitesPotential Release Sites
South SantiamSouth Santiam– Green PeterGreen Peter
Coast Fork WillametteCoast Fork Willamette– DorenaDorena– Cottage GroveCottage Grove
McKenzieMcKenzie– Blue RiverBlue River
Green Peter
ConclusionsConclusionsRe-establish Anadromous Fish Above Man-made Re-establish Anadromous Fish Above Man-made
BarriersBarriers
High fish management priority to High fish management priority to restore natural production above restore natural production above damsdams
Long term solutionLong term solution Success possible in short termSuccess possible in short term Rectify fish passage problems at damsRectify fish passage problems at dams Need commitment of agencies, Need commitment of agencies,
financial resources, and timefinancial resources, and time