Boardman Creek-Willamette Confluence Complexity Restoration Implementation

Salmonid Habitat Restoration and Acquisition

Instream Habitat Riparian Habitat
Project IDOWEB 222-8207-19775
Recovery DomainsWillamette R. - Lower Columbia
Start Date07/01/2021
End Date02/28/2024
Last Edited07/21/2022
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The restoration project site is at the confluence of Boardman Creek and the Lower Willamette River (~RM 22.7). Historically, the lower river and the confluence of cold-water tributaries entering the river provided valuable high-quality complex rearing habitats for juvenile salmon and steelhead migrants, which are present every month of the year with the highest concentrations winter through spring. Much of the historic habitat is now lost to development along the shoreline and tributary streams. There is very little habitat complexity with large wood within the floodplain; docks, piers, and rock revetments have replaced much of the natural bank habitat. Opportunities for improving off-channel and floodplain habitat complexity and the associated juvenile rearing habitat for Upper Willamette and Clackamas Population salmonids are concentrated in and around Boardman Creek and the other cold-water tributaries that remain (USGS 2018, DEQ, 2020). NCWCs 2020 Rapid-Bioassessment and the Clackamas FIP identified the confluence of Boardman Creek and the Willamette as a high-priority location for enhancing floodplain complexity. The proposed restoration project will include placement of apex large wood structures with additional complex large wood structures at the Boardman-Willamette confluence and adjacent floodplain. The added large wood will be designed to interact with high flows to provide complex habitat where juvenile fish can escape high-velocity flows to rest and feed. Large wood placed in the creeks channel and within an existing pool, will also provide summer/early fall habitat complexity for fish accessing this cold-water stream. Additionally, the floodplain will be treated for invasive species and re-planted with native vegetation.

Project Benefit    

Juvenile salmon and steelhead from both Clackamas and upper Willamette River populations are likely present every month of the year. For example, beach seining studies in the Lower Willamette River have noted juvenile Chinook salmon in every month of the year, with peak densities between January and April when river levels are high. Improving habitat complexity at this key location will provide habitat, including high-water refuge habitat, for juvenile salmon. Monitoring observations indicate a large number of juvenile Chinook are present in Rinearson Natural Areas restored off-channel and cold-water tributary habitats. Currently, the site has minimal habitat complexity: Large wood in Boardman Creeks channel or within the floodplain area is largely absent -- small pieces of wood are present, but there are no large pieces or accumulations consisting of multiple pieces of wood. Adding large wood to the site will improve both high-water refugia and cold-water habitat for both Clackamas and upper Willamette salmon and steelhead populations.


Metric Completed Originally
Instream Habitat
  Stream Miles Treated .05
Riparian Habitat
  Stream Miles Treated .09
  Acres Treated .5

Funding Details

Report Total:$287,552

Project Map



  • Worksite Identifier: 19775
  • Start Date:
  • End Date:
Area Description

No Area Description data was found for this worksite.

Location Information

  • Basin: Willamette
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Oregon
  • Recovery Domain: Willamette R. - Lower Columbia
  • Latitude: 45.395269
  • Longitude: -122.628363


  • Lower Columbia River Coho Salmon ESU
  • Lower Columbia River Steelhead DPS
  • Lower Columbia River Chinook Salmon ESU
  • Upper Willamette River Chinook Salmon ESU




  • C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)
    •      . . C.0.a Habitat restoration and acquisition funding
    •      . . C.0.b Length of stream treated/protected
    •      . . C.0.c
      Project identified in a Plan or Watershed Assessment
    •      . . C.0.d.1 Project Monitoring (LOV)
    •      . . C.4 Instream Habitat ProjectY (Y/N)
      •      . . . . C.4.a Instream Habitat Funding
      •      . . . . C.4.b Total length of instream habitat treated
      •      . . . . C.4.d.1 Channel structure placementY (Y/N)
      •      . . C.5 Riparian Habitat ProjectY (Y/N)
        •      . . . . C.5.a Riparian Habitat Funding
        •      . . . . C.5.b.1 Total riparian miles streambank treated
        •      . . . . C.5.b.2 Total Riparian Acres Treated
        •      . . . . C.5.c.1 Riparian plantingY (Y/N)
        •      . . . . C.5.h.1 Riparian plant removal/controlY (Y/N)