Collins Bridge Fish Barrier Removal

Salmonid Habitat Restoration and Acquisition

Fish Passage Improvement
Project ID15-1307 R
Recovery DomainsInterior Columbia
Start Date12/09/2015
End Date10/27/2017
Last Edited04/19/2022
1 - 1


The Washington Department of Fish and Wildlife (WDFW) corrected a complete fish passage barrier by removing a relic structure from under Collins Bridge on Dry Creek, north of Walla Walla. The relic structure consisted of a concrete apron and wing walls from an old Lutin arch bridge. The apron and south footing of the old structure were undercut, allowing flow to go under the apron and creating a fish passage barrier during lower flows. Additionally, when flows overtopped the apron, a sheeting flow velocity barrier with a 0.61 meter water surface drop was created.

WDFW removed the apron and wing walls of the old bridge. Upon removal of the old concrete, the banks were sloped appropriately to designed specifications and then covered in 4 bedding material, a filter blanket, and then 2 of rip rap boulders to protect the current bridge infrastructure. Upon completion of the slopes, a roughened channel that consisted of a pre-determined rock size mixture covered in a larger river rock top layer, was installed under the bridge to prevent the stream from head cutting. The project was completed within the in water work window of 2016 and stayed within cost and scope parameters of the project.

Dry Creek, a tributary of the Walla Walla River, is a steelhead spawning and rearing stream. Bull Trout and spring Chinook Salmon were historically in Dry Creek, but were not observed when WDFW did surveys in the early 2000s. Removal of this imminent threat identified in the Snake River Salmon Recovery Plan provides fish access to 10.2 miles of upstream habitat, up to the next partial fish passage barrier. Another 19.9 miles of river lie beyond that partial barrier, including the head waters of the North and South Forks of Dry Creek.

Project Benefit    

Restore fish passage under Collins Bridge where Lower Waitsburg Road spans Dry Creek


Metric Completed Originally
Fish Passage
  Barriers Removed 1 1
  Miles Opened 10.20 10.20

Funding Details

Report Total:$126,158

Project Map


1-Collins Bridge    

  • Worksite Identifier: 1-Collins Bridge
  • Start Date:
  • End Date:
Area Description

No Area Description data was found for this worksite.

Location Information

  • Basin: Middle Columbia
  • Subbasin:
  • Watershed:
  • Subwatershed:
  • State: Washington
  • Recovery Domain: Interior Columbia
  • Latitude: 46.15441591
  • Longitude: -118.31500395


  • Middle Columbia River Steelhead DPS




  • C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)
    •      . . C.0.a Habitat restoration and acquisition funding 126,158.35
    •      . . C.0.b Length of stream treated/protected .01
    •      . . C.0.c
      Project identified in a Plan or Watershed Assessment
    •      . . C.0.d.1 Project Monitoring (LOV)
    •      . . C.0.d.2 Monitoring Location (LOV)
    •      . . C.2 Fish Passage ImprovementY (Y/N)
      •      . . . . C.2.a Fish Passage Funding 126,158.35
      •      . . . . C.2.b.1 Length of stream made accessible 10.20
      •      . . . . C.2.b.3 Type of blockage/barrier (LOV)
      •      . . . . C.2.b.4 Number of blockages/impediments/barriers impeding passage 1
      •      . . . . C.2.c.1 Fish passage blockages removed or altered (other than road crossings reported in C.2.f to C.2.i)Y (Y/N)
        •      . . . . . . C.2.c.2 Number of blockages/impediments/barriers removed/altered 1