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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.

Pettyjohn Grade Road
S. Patit Road: at mile post 4.5

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

Robinette Mountain Road
Tucannon Road

Road Load Restriction Regulations
Practical Applications for Load Restrictions
Details on Bridge Load Restrictions
Resolution Regarding Load Restrictions

Permit to Exceed Special Road Restrictions

ORV Resolution 2010-12
ORV use on Columbia County Roads


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