The purpose of the Tri-County Cooperative Weed Management Area is to facilitate cooperation among all land managers and landowners to manage a common problem with noxious weeds. Our mission being to serve as responsible stewards of the land and resources in the state of Oregon by protecting and preserving all lands and resources in the tri-county area from the degrading impact of exotic, invasive noxious weeds.


Click on the county names to see what we are doing in your area

Download here our list of contractors for 2018:

The 2017 Spring and Summer was filled with helicopter applications, outreach programs, contractor inspections, and much more throughout Wallowa, Union, and Baker County.

Contractor: Leading Edge Aviation

For those interested in learning how to calibrate backpack sprayers or ATV sprayers, click on the links below.


Tri-County CWMA is accepting proposal bids for  auditing services .  Proposal bids are due by the deadline of April 30, 2018. Tri-County reserves the right to accept or reject any or all bids. 

For all information, click on the link: Request for Proposal. Questions?  Please contact Tri-County.

The 2018 Tri-County Budget was offically passed on December 5th. 

Please check out the budget on the linked budget and budget narrative!

*click the blue links to view the attachments*

Meadow hawkweed landowner letters have been mailed out to landowners in the Cricket Flat region of Union County.  If you received a letter, please fill out the Permission to Access Private Land document and return before April 20th, 2018.  This is a great oppurtunity to get your noxious weeds treated for half the cost!  Funded through Oregon State Weed Board.