Burlington Northern Railroad Bridge, Spanning Willamette River at River Mile 6.9, Portland, Multnomah County, OR

Significance: Willamette River Bridge 5.1 is the south end part of a 4-3/4 mile-long network of railroad bridges, causeways, and cut system linking the mainlines north and south of Portland. The bridge is one of the major works of renowned bridge engineer, Ralph Modjeski.

Unprocessed Field note material exists for this structure: FN-2

Survey number: HAER OR-7

Building/structure dates: 1906- 1908 Initial Construction

Building/structure dates: 1954 Subsequent Work

Building/structure dates: 1957-1959 Subsequent Work

Building/structure dates: 1963 Subsequent Work

Building/structure dates: 1979 Demolished

Building/structure dates: 1985-1988 Subsequent Work

swing bridges wooden buildings transportation railroad companies civil engineering economic development urban growth ferries navigation fires recreation railroad bridges steel truss bridges multnomah county burlington northern railroad bridge burlington northern railroad bridge willamette willamette river river mile portland multnomah oregon hugh ackroyd american bridge company burlington northern railroad company benjamin l crosby general construction company great northern railroad edward h harriman james j hill historic american engineering record needles howard modjeski and masters ralph modjeski otto gas engine works photo art commerical studios fred small portland spokane alfred staehli alfred m staehli union pacific railroad henry villard photo ultra high resolution high resolution locomotive bn photo archive library of congress

1969 - 1980

Library of Congress

http://www.loc.gov/

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