Eradicating Invasive Plants that Threaten Salmon and Steelhead Habitat in the City and Borough of Juneau

Salmonid Habitat Restoration and Acquisition

Instream Habitat
Project IDAK53008
Recovery Domains -
Start Date03/01/2020
End Date11/30/2022
Last Edited02/27/2024
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This project used herbicide to control four invasive plant species (Bohemian knotweed, reed canarygrass, European bird cherry, and European mountain ash. Knotweed and canarygrass) that threaten salmon habitat in the City and Borough of Juneau. Infestations of knotweed and reed canarygrass growing adjacent to fish habitat were spayed with herbicide using a low-pressure backpack sprayer. Invasive trees were treated with herbicide by tapping herbicide cartridges into the cambium tissue around the trunk or by squirting herbicide into saw cuts made to the trunk.

The initial estimate of stream miles to be treated turned out to be somewhat ambitious, and poor weather, which limited treatment of canarygrass and knotweed during the narrow control season, further reduced the amount of stream that could be treated.

Project Benefit    

Invasive plant infestations near salmon and steelhead habitat eliminate or alter several ecological functions that support fish habitat and production. By eradicating these infestations, self-sustaining native plant communities will be restored at these sites, either through natural repopulation by adjacent native plants (e.g., seed dispersal, vegetative growth) or through active planting of native plant seeds or whole plants after the project period has ended. Infestation sites far from salmon and steelhead habitat will be eradicated to prevent their spread to salmon and steelhead habitat.


Metric Completed Originally
Instream Habitat
  Stream Miles Treated 7.50 14.40

Funding Details

Report Total:$61,621

Project Map



  • Worksite Identifier: 46843337
  • Start Date:
  • End Date:
Area Description

No Area Description data was found for this worksite.

Location Information

  • Basin: Northern Southeast Alaska (190103)
  • Subbasin: Lynn Canal (19010301)
  • Watershed: Mendenhall River-Frontal Gastineau Channel (1901030106)
  • Subwatershed: Salmon Creek-Frontal Gastineau Channel (190103010606)
  • State: Alaska
  • Recovery Domain:
  • Latitude: 58.3589864
  • Longitude: -134.50891824


  • Un-Named ESU Chinook
  • Un-Named ESU Chum
  • Un-Named ESU Coho
  • Un-Named ESU Pink
  • Un-Named ESU Sockeye
  • Un-Named ESU Steelhead




  • C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)
    •      . . C.0.a Habitat restoration and acquisition funding 61,621.00
    •      . . C.0.b Length of stream treated/protected 7.50
    •      . . 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.4 Instream Habitat ProjectY (Y/N)
      •      . . . . C.4.a Instream Habitat Funding 61,621.39
      •      . . . . C.4.b Total length of instream habitat treated 7.50
      •      . . . . C.4.g.1 Plant removal/controlY (Y/N)
        •      . . . . . . C.4.g.2
          Species of plants removed/controlled
        •      . . . . . . C.4.g.3 Miles of stream treated for plant removal/control 7.50
        •      . . . . . . C.4.g.4 Acres of streambed treated for plant removal/control 29.6