Historic Columbia River Highway, Mosier Twin Tunnels, East of Mosier, Troutdale, Multnomah County, OR
Photo Caption Pages
East of Mosier, Troutdale vicinity, OR
Find maps of Troutdale, OR
Documentation compiled after 1968.
Survey number HAER OR-36-T
Building/structure dates: 1920 initial construction
Building/structure dates: 1921 subsequent work
Building/structure dates: 1938 subsequent work
Building/structure dates: 1953 subsequent work
National Register Number: 83004168
Part of building/structure is in Mosier vicinity, Wasco County, OR.
Significance: The only set of highway tunnels with adits or windows in Oregon. One of the few examples of this type of tunnel in the United States.
Kern, A. D.
Oregon Department Of Transportation
Elliott, John Arthur
Klein, Roy A.
Keiffer, Roger, Photographer
Norman, James, Photographer
Lowe, Jet, Photographer
Hadlow, Robert W., Historian
Historic American Engineering Record (Library of Congress)
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