Cultural resources & archaeology

Follow the procedures on this page to address effects on historic and archeological cultural resources.

Federal and state laws mandate that all projects be evaluated for their effects on cultural resources.

Determine the type of review needed

If your project:

The CRS will define the project’s Area of Potential Effect (APE), initiate consultation with interested and affected parties, and identify resources in the project area.

Historic bridges

Check the inventory of historic state highways and bridges in Washington state to see if there are any bridges recommended, nominated, determined eligible or listed on the National Register of Historic Places (NRHP) in the project area.

If your project affects a federal interstate highway bridge included in one or more of the following lists, maintained by the FHWA, your CRS must include the bridge in the Section 106 evaluation: 

Contract consultant services

Consultant scopes of work (DOCX 49KB)

166,800 electric vehicle

registrations in Washington in 2023, up from 114,600 in 2022.

87 wetland compensation sites

actively monitored on 918 acres in 2023.

25,000 safe animal crossings

in the Snoqualmie Pass East Project area since 2014.