Plans for maintaining vegetation along our highways

Our maintenance crews use integrated roadside vegetation management plans (IRVM) to select the right tools, techniques and timing, for taking care of the soil and greenery alongside highways.

Every year, our training programs are updated based on the successes and lessons learned. Any public group or person is welcome to also submit their own information to help us stay up to date.

The plans list intended routine maintenance activities, weed control priorities, sensitive area locations and other relevant information. They also include a record-keeping system of mapping and tracking work through our Highway Activity Tracking System (HATS).

For questions and comments on the plans, contact Ray Willard at 360-705-7865.

Eastern Region

Northwest Region  

North Central Region

Olympic Region

South Central Region 

Southwest Region