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

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Historic American Buildings Survey/Historic American Engineering Record/Historic American Landscapes Survey

3 drawings
28 b&w photos
44 data pages
4 photo caption pages
5 color transparencies

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

CALL NUMBER:
HAER ORE,26-PORT,9-

REPRODUCTION NUMBER:
[See Call Number]

MEDIUM:
Measured Drawing(s): 3 (24 x 36 in.)
Photo(s): 28 (4 x 5 and 5 x 7 in.)
Data Page(s): 43 plus cover page
Photo Caption Page(s): 4
Color Transparencies: 5

DATE:
Documentation compiled after 1968.

CREATOR:
Historic American Engineering Record, creator

NOTE:
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:
OREGON--Multnomah County--Portland
bascule bridges
vehicular bridges

COLLECTION:
Historic American Engineering Record (Library of Congress)

REPOSITORY:
Library of Congress, Prints and Photograph Division, Washington, D.C. 20540 USA

DIGID:
http://hdl.loc.gov/loc.pnp/hhh.or0292

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.

CONTROL #:
OR0292

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