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CWMA- Channeled Scabland Cooperative Weed Management Area

The CWMA is a “grassroots” organization where local partners and communities voluntarily combine their resources to manage noxious weeds across ownership boundaries. The CWMA originated in 2008 and first held public meetings to build interest among landowners, then identified boundaries and objectives and formed a steering committee. By 2009 a Strategic Plan was adopted. 


CWMA Mission 

Invasive plants do not recognize ownership or political boundaries. Long-term reduction in the spread of noxious weeds and other invasive plants must include a broad-scale approach to management and control. Cooperative Weed Management areas are the organizations choice in the promotion of a landscape approach across jurisdictional boundaries. 


The entities and individuals that have come together to form the Channeled Scablands Cooperative Weed Management Area did so voluntarily in the spirit of cooperation in order to more effectively and economically realize our collective goals to manage invasive plants that degrade the productivity and ecological health of all lands under their influence. 


CWMA Boundaries

Comprised of portions of Spokane, Whitman, and Lincoln Counties in Eastern Washington that are South of I-90, west of Old Highway 195, and north of Highway 23. The boundary may be adjusted as necessary to meet CWMA goals.  

Cost Share is Available - please go to our Cost Share pages


The Purpose of the CWMA is to:

  • Suppress, and where possible eradicate, established weed infestations 

  • Prevent further spread of noxious weeds

  • Prevent new invasive species from entering or getting established in the area

  • Promote conservation of native plant species where applicable 


  • Partnering with entities with similar goals to maximize available resources 

  • Acquiring new and additional resources 

  • Collaborating to overcome constraints that are related to political, jurisdictional, and ownership limitations 

  • Informing the public about key aspects of wed management 

  • Monitoring and mapping existing weed populations 

  • Ensuring landowner rights are respected

The CWMA has many stakeholders who give their time and effort into making the group and consistent resource for landowners.


Steering Committee

  • Terry Mansfield- Landowner, Chair

  • Nancy Belsby- landowner, Vice-Chair

  • Steve Barratt- Landowner 

  • Becky Brown- Eastern Washington University 

  • Kurt Merg- Washington Department of Fish & Wildlife 

  • Dave Mundt- Spokane County Noxious Weed Control Board 

  • Mike Rule- U.S. Fish & Wildlife Service, Turnbull NWR 

  • Larry Skillestad- USDA-APHIS 

  • Harvey Zacher- Landowner



  • Eastern Washington University 

  • Lincoln County Conservation District

  • Lincoln County Noxious Weed Control Board 

  • Multiple Private Landowners 

  • Spokane Conservation District 

  • Spokane County Noxious Weed Control Board 

  • Turnbull National Wildlife Refuge 

  • Upper Columbia Resource Conservation & Development Council 

  • USDA Animal & Plant Health Inspection Service 

  • USDA Natural Resources Conservation Service 

  • USDI Bureau of Land Management 

  • Washington Department of Natural Resources 

  • Washington Department of Fish & Wildlife 

  • Washington Depart of Parks & Recreation- Columbia Plateau Trail State Park 

  • Washington State University Extension 

  • Whitman County Noxious Weed Control Board 

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