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Columbia County
341 E. Main St.
Dayton, WA 99328

County Road Regulations & Information

Columbia County Public Works: 509.382.2534

This information is provided as a courtesy; actual documents are on file at the Columbia County Public Works office.

Columbia County Road Standards

Tucannon Road is limited to 4 tons per axle. Haul permits are required. Please contact the Public Works office for more information and to get permits.

Columbia County Winter Road Closures:

Winter Road Closures Click Here

Columbia County Emergency Road Closures Due to Winter Weather:
None at this time

Columbia County Emergency Road Closures Due to Flooding:
This list of road closures will be updated as soon as information becomes available. Please be aware that some of the roads listed here will remain closed for an extended period of time, up to several months. Click here for a map of the road closures, and see below for the list:

Eckler Mountain Road: Open, but section of 1-lane road near Pioneer Park
Pettyjohn Grade Road

S. Patit Road: at mile post 4.5
Tucannon Road: Marengo to Hartsock is open, but sections throughout are 1-lane traffic only
Tucannon Road: Closed at fish hatchery

Open to local traffic only:
Baileysburg Road
Brines Road
King Grade Road
Robinson Fork Road
S. Patit Road
S. Touchet Road: mile 4 & up

Crall Hollow Road
N. Patit Road
N. Touchet Road
Tucannon Road

Columbia County Roads with Load Limits: 
Eckler Mountain Road
Hartsock Grade Road
Hatley Gulch Road

Robinette Mountain Road

Road Load Restriction Regulations
Practical Applications for Load Restrictions
Resolution Regarding Load Restrictions

ORV Resolution 2010-12
ORV use on Columbia County Roads


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