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Hawthorne Bridge, Spanning Willamette River at Hawthorne Boulevard &, Portland, Multnomah County, OR



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Item Title


Location
Spanning Willamette River at Hawthorne Boulevard &, Portland, OR

Find maps of Portland, OR


Created/Published
Documentation compiled after 1968.

Notes
Survey number HAER OR-20
Unprocessed field note material exists for this structure (FN-7; N870).
Building/structure dates: 1909 initial construction
Significance: The Hawthorne Bridge is the oldest extant vertical lift bridge in the United States. It is the oldest of Portland's Willamette bridges, initiating the replacement of earlier swing spans. Designed by Waddell & Harrington, as the firm's earliest surviving lift bridge it reveals how Harrington managed the transition from Waddell's South Halsted Street prototype to the "standard" vertical lift form. Reconfiguration of its approaches, replacement of its wooden deck by steel, and other modifications embody 90 years of highway engineering history.

Subjects
Vertical Lift Bridges
Vehicular Bridges


Related Names
Waddell & Harrington
Pennsylvania Steel Company
United Engineering & Construction Company
Robert Wakefield & Company
City Of Portland
Norman, James, Photographer
Schwab, Leslie, Photographer
McGaw, Judith A., Historian


Collection
Historic American Engineering Record (Library of Congress)

Contents
Photograph caption(s): 
1. South elevation
2. Perspective view from southwest
3. Perspective view from northwest
4. View of central span from south
5. West portal elevation
6. Perspective view from southwest showing central span
7. View of lift span from deck
8. Detail, cable connection to lift span
9. View from top of east tower
10. View from top of east tower
11. Engine room and reduction gears atop central span
12. Operator in control room


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