Salisbury Street Bridge, Spanning C&O Canal (Milepost 99.65) & WM Railroad, Williamsport, Washington County, MD
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Spanning C&O Canal (Milepost 99.65) & WM Railroad, Williamsport, MD
Find maps of Williamsport, MD
Documentation compiled after 1968.
Survey number HAER MD-24
Unprocessed field note material exists for this structure (FN-20).
Building/structure dates: 1879 initial construction
Significance: Salisbury Street Bridge was built in 1879 for the Chesapeake & Ohio Canal Company by the Patapsco Bridge & Iron Works, Baltimore, Maryland; Wendel Bollman, proprietor. It is a single-span, wrought-iron, pony-Pratt truss spanning 67 feet over the C&O Canal. The bridge has a construction depth of 9 feet and is 13 feet, 3 inches wide. It is one of two known surviving Bollman-built bridges of this simple, pony-Pratt type in the State of Maryland (not to be confused with the Bollman suspended and trussed bridge at Savage, Maryland, for which he received a patent). Wendel Bollman, whose company manufactured this bridge, is notable as an engineer for his design of an iron suspended and trussed bridge which was one of the first all-iron bridges used consistently by a railroad. Salisbury Street Bridge is significant for its association with Bollman and because it is an early example of an important, standard truss type, in unaltered condition.
Wrought-iron Truss Bridges
Patapsco Bridge & Iron Works
Historic American Engineering Record (Library of Congress)
1. VIEW OF CAST-IRON MAKER'S PLATE, BOLTED TO TOP CHORD OF BRIDGE, MARKED '1879, W. BOLLMAN, BALTIMORE.'
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