Helpful Noxious Weed Information

What is a noxious weed?

A terrestrial, aquatic, or marine plant designated by the State Weed Board under ORD 569.615 as among those representing the greatest public menace and as a top priority for action by weed control programs. 

"A" Listed: weed of known economic importance which occurs in the state in small enough infestations to make eradication or containment possible; or is not known to occur, but its presence in neighboring states make future occurence in Oregon seem imminent.

"B" Listed: a weed of economic importance which is regionall abundant, but which may have limited distribution in some counties. 

"T" Listed: annually, a designeted list of weed species is selected that will be the focus for prevention and control by the Noxious Weed Control Program . Action against these weeds will recieve priority. Selected from the "A" or "B" weed list. 

For more information about Oregon's noxious weeds click  

To learn more about each county's weed control laws, click on your county's name:

Our spring and summer 2019 contracts are now available! Tri-County does not require formal bids for work, but instead selects local, licensed herbicide applicators based on hourly rates, experiance, and past project performance. If you are interested in working for us for the first time, please contact Samantha Bernards before submitting any paperwork.

The following are all project available for the spring and summer of 2019 with Tri-County. To submit a project proposal, please fill out the Hourly Bid Template, and email Tri-County with a list of which project you are interested in, including a breif explination of your qualifications for the desired project. Tri-County will award project on April 5th, 2019 and will be reaching out to contractors individually. Click on the project names below to download the bid information: