West End-North Side Bridge, Spanning Ohio River, approximately 1 mile downstream from confluence of Monongahela & Allegheny rivers, Pittsburgh, Allegheny County, PA

Photographs cover approach spans only; Ohio River span not shown.

Significance: After two decades of agitation by the local business community, the West End-North Side Bridge was completed in 1932 by the American Bridge Company under contract to Allegheny County. The main span is a graceful, 778-foot long, tied-arch structure which employed pre-stressed hangers between the twin arches and the bottom chords. This bridge was placed on the National Register of Historic Places in 1979 for the engineering and aesthetic qualities of the main span. Approaches to the high level main span are by three pony trusses on the south and four pony trusses on the north.

Survey number: HAER PA-96

Building/structure dates: 1931- 1932 Initial Construction

Building/structure dates: 1948 Subsequent Work

Building/structure dates: 1955 Subsequent Work

Building/structure dates: 1958 Subsequent Work

Building/structure dates: 1977 Subsequent Work

National Register of Historic Places NRIS Number: 79003143

steel truss bridges steel arch bridges transportation vehicular bridges pittsburgh pa end north bridge west end north side bridge ohio ohio river confluence monongahela allegheny rivers allegheny rivers pittsburgh allegheny county pennsylvania allegheny county department of public works american bridge company john bauman foundation company incorporated gai consultants historic american engineering record robert j houston gregory s jones norma j knopp william p mchugh frank policicchio john s prizner dan shaw henry tranter dennis m west james h wylie ultra high resolution high resolution industrial history library of congress national register of historic places

1969 - 1980

Library of Congress

http://www.loc.gov/

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