Four Mile Bridge, Copper Creek Road, Spans Table Rock Fork, Mollala , Molalla, Clackamas County, OR
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Photo Caption Pages
Mollala, Molalla vicinity, OR
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Documentation compiled after 1968.
Survey number HAER OR-13
Unprocessed field note material exists for this structure (FN-4).
Building/structure dates: 1943 initial construction
Building/structure dates: 1950 subsequent work
Building/structure dates: 1976
Building/structure dates: 1989 demolished
Significance: One of two remaining timber deck arch bridges in Oregon, Four Mile Bridge incorporates a unique combination of a truss and an arch to cross a short 118-foot span. Weyerhaeuser Company hauled over 1 billion board feet of timber over the bridge from 1943 to 1974, making a significant economic contribution to nearby communities. Built from old-growth timber, the bridge reflects local response to and involvement in national economic effects of World War II. Four Mile Bridge was determined eligible for inclusion in the National Register of Historic Places in 1986.
Historic American Engineering Record (Library of Congress)
1. DOWNRIVER VIEW OF BRIDGE, LOOKING SOUTH-SOUTHWEST Peter J. Edwards, photographer, August 1988
2. UPRIVER VIEW OF BRIDGE, LOOKING NORTHEAST Mike Hanemann, photographer, August 1988
3. VIEW OF BRIDGE DECK, LOOKING EAST-SOUTHEAST Mike Hanemann, photographer, August 1988
4. VIEW OF BRIDGE DECK, LOOKING WEST-NORTHWEST Mike Hanemann, photographer, August 1988
5. DETAIL VIEW SHOWING ARCH AND SUPPORTS, LOOKING WEST-SOUTHWEST Mike Hanemann, photographer, August 1988
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