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South Main St over Saw Mill Run
USGS 7.5" Topo Quad - UTM Coordinates:
Pittsburgh West - Zone 17; 0582 4477
South Main St [PA60]
-- west of West End Circle [US19, PA51, PA60, PA837]
-- Sanctus St
-- Saw Mill Run
TYPE OF CONSTRUCTION / DESIGN:
Through riveted steel plate girder on stone abutments
LENGTH OF MAIN SPAN:
TOTAL LENGTH (including longest elevated ramp):
HEIGHT OF DECK:
YEAR ERECTED / ENGINEER:
c1915, Allegheny County
from the PennDOT Historic Bridges survey:
The bridge carries a 2 lane road and 2 sidewalks over a stream on the edge of a mixed-use area dominated by industrial and commercial structures in Pittsburgh's West End. The SHPO has determined a potential West End Historic District, but the bridge is just outside the boundary of the proposed district.
The ca. 1915, skewed, single span, built up thru girder bridge is supported on ashlar abutments. The girder bridge has steel I beam floorbeams, and a concrete deck. The bridge is an example of a common type with no innovative or distinguishing detail. Thru girder bridges were first developed by the railroad industry in the 1850s, and they were used on vehicular roadways beginning in the late 19th century. Neither the bridge nor its setting and context are historically or technologically noteworthy. It is just outside of the boundary of the proposed West End Historic District.
view page - Other structures in the West End Valley
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