Additional resources

Smith, Dwight A. Columbia River Highway Historic District. Salem: Environmental Section, Technical Services Branch, Oregon State Highway Division, Oregon Department of Transportation, 1984.

Hadlow, Robert W. Historic Columbia River Highway Recording Project. Historic American Engineering Record, HABS/HAER Division, National Park Service, U.S. Dept. of the Interior, 1994.

Lancaster, Samuel C. The Columbia: American's Great Highway through the Cascade Mountains to the Sea. Third Edition. Portland: J.K. Gill Company, 1926.

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