Steelhead Studies

Salmonid Research, Monitoring, and Evaluation (RM&E)

Project IDPCSRF04B
Recovery DomainsWillamette R. - Lower Columbia
Start Date01/01/2005
End Date06/21/2005
Last Edited06/11/2018
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The study would fund the continued operation of the smolt trap and the operation of an adult fish weir. The resulting data would be used to design a program to aid in continued survival

Project Benefit    

Little is known about the history and current status of Upper Willamette ESU steelhead on the west side of the watershed. The study will provide valuable imfortion on their current status and aid in establishing programs to assure their continued survival in the area.


Metric Completed Originally
Research and Monitoring
  Stream Miles Monitored 30.00 30.00

Funding Details

Report Total:$21,108

Project Map



  • Worksite Identifier: 20022293
  • Start Date: 01/01/2005
  • End Date: 06/01/2005
Area Description

No Area Description data was found for this worksite.

Location Information

  • Basin: Willamette
  • Subbasin: Yamhill
  • Watershed: 1709000801
  • Subwatershed:
  • State: Oregon
  • Recovery Domain: Willamette R. - Lower Columbia
  • Latitude: 45.0682557025947
  • Longitude: -123.628459140139


  • Upper Willamette River Chinook Salmon ESU
  • Upper Willamette River Steelhead DPS




  • E.0 Salmonid Research, Monitoring, and Evaluation (RM&E)Y (Y/N)
    •      . . E.0.a RM&E Funding 21,108.00
    •      . . E.0.b
      Complement habitat restoration project
    •      . . E.0.c
      Project identified in a plan or watershed assessment.
    •      . . E.0.d.1 Number of Cooperating Organizations 1
    •      . . E.0.d.2
      Name Of Cooperating Organizations.
      Oregon Department of Fish and Wildlife
    •      . . E.0.e.1 Number of reports prepared 0
    •      . . E.0.e.2
      Name Of Report
    •      . . E.1 MonitoringY (Y/N)
      •      . . . . E.1.a Monitoring funding 21,108.00
      •      . . . . E.1.b.1 Stream Miles Monitored 30.00
      •      . . . . E.1.b.2 Acres of Watershed Area Monitored 30.0
      •      . . . . E.1.c.1 Adult salmonid population monitoringY (Y/N)
        •      . . . . . . E.1.c.1.a # miles (to nearest 0.01 mile) monitored for adult salmonids .01
      •      . . . . E.1.c.2 Salmonid smolt or fry monitoringY (Y/N)
        •      . . . . . . E.1.c.2.a # miles (to nearest 0.01 mile) monitored for Salmonid smolt or fry .01
        •      . . . . E.1.d
          Name Of Comprehensive Monitoring Strategy/Program
        •      . . . . E.1.e
          Description of monitoring
          As per the contract, the adult fish weir was operated from January 1st through May 15th, 2005. No adult steelhead were captured by the fish weir. Significant flow events in January and late March inundated and damaged the weir. It is likely that adult steelhead were able to bypass the weir during these flow events. It is not uncommon for spawned and deceased adults to float back onto the weir. This did not occur in 2005. The final result remains that there were no adult captures in 2005.The smolt trap was operated from February 15th through June 21st , 2005. This met the contract requirement of operation from February 15th through May 15th, 2005. Higher flows in late May and June allowed us to operate the trap longer. There were 65 steelhead captured between March 15th and May 19th, 2005. Our population estimate based on mark and recapture data at the smolt trap and the estimated smolt to adult ratio would be 1,048 smolts in the Agency system and between 21 to 62 adults. We urge caution in the value of the estimates. They represent only one year of data for a population that can vary significantly seasonally. Further studies will be able to detect trends and will corroborate trap efficiencies estimates.The assessment provided valuable information on the number, health and migration timing for Westside upper Willamette ESU listed steelhead. Very little is known about the status and numbers of steelhead on the Westside of the Willamette basin. The information gained in this survey and surveys in the future will be very valuable to tribal, state and federal managers. The National Marine Fisheries Service determined that the Upper South Yamhill watershed is rated at moderate value to the overall recover of steelhead in the Upper Willamette ESU. Information gained from this study and subsequent studies will be critical in assessing the long term survival of this species in the sub-basin.