Oregon Department of Transportation
N-B Hatch Company
Historic Columbia River Highway Advisory Committee
This important historic site was brought into public ownership, documented through advanced technology, and restored as a hiking and bicycling transportation facility. Before the project began, the highway was in private ownership and the Mosier Twin tunnels were filled with rock. The tunnels and roadways were restored using the lost art of stone masonry along with advanced state-of-the-art construction practices. This impressive project provides recreational opportunities along with breathtaking views of the Columbia River Gorge from a historical point of view. By restoring and reusing this facility, a National Register property is preserved and showcased for public enjoyment.