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Broadway Bridge, Spanning Willamette River at Broadway Street, Portland, Multnomah County, OR



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Item Title


Location
Spanning Willamette River at Broadway Street, Portland, OR

Find maps of Portland, OR


Created/Published
Documentation compiled after 1968.

Notes
Survey number HAER OR-22
Unprocessed field note material exists for this structure (FN-9; N872).
Building/structure dates: 1912 initial construction
Significance: The Broadway Bridge is the first bascule span built in Portland and, at the time constructed, the longest in the United States. Its completion resulted in a dramatic shift in land values and business concentration in Portland. Those consequences profoundly influenced subsequent Willamette River bridge construction decisions. Ralph Modjeski, a premier American bridge engineer, designed the Bridge, incorporating the largest Rall-type bascule ever built, now one of the few surviving Rall mechanisms. Its Lovejoy Ramp, designed by Gustav Lindenthal in 1926-27, was removed during this recording project.

Subjects
Bascule Bridges
Vehicular Bridges


Related Names
Modjeski, Ralph
Strobel Steel Construction
Pennsylvania Steel Company
Union Bridge & Construction Company
Multnomah County
McGaw, Judith A., Historian
Norman, James, Photographer
Schwab, Leslie, Photographer


Collection
Historic American Engineering Record (Library of Congress)

Contents
Photograph caption(s): 
1. View of main span from north
2. Telephoto view from north
3. View north from Steel Bridge
4. View of engine room from west end of lift span
5. Interior steel work of western bascule span
6. Detail, riveting on center west Parker truss, Steel Bridge in background
7. Detail, Raul bascule hinge, roller and counterweight in closed position
8. Same as OR-22-7, in midway position
9. Same as OR-22-7, in open position
10. View of spans in open position
11. Interior of motor room with reduction gears
12. General view of center spans
13. Center and Parker spans from south, closed position
14. Same as OR-22-13, open position
15. Lift spans in open position
16. Lift spans in open position
VIEW OF MAIN SPAN FROM NORTH.
VIEW OF MAIN SPAN FROM NORTH.
INTERIOR STEEL WORK OF WESTERN BASCULE SPAN.


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