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

Spring is here and so are the weeds!!!

Our contractors are gearing up for spring meadow hawkweed and rush skeletonweed treatments. Landowner participation is critical to the success of these projects. Download our landowner permission letters and submit them via email here:



Meadow Hawkweed

Rush Skeletonweed

Download here our list of contractors for 2016

Union County Weed Levy 

Ballot Measure 31-87

Election date: May 17th 2016