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Williamsport

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Salisbury Street Bridge, Spanning C&O Canal (Milepost 99.65) & WM Railroad, Williamsport, Washington County, MD



B&W Photos

HB590058
View Of Cast-iron Maker's Plate, Bolted To Top Chord Of Bridge, Marked '1879, W


Data Pages


Drawings


Photo Caption Pages


Item Title


Location
Spanning C&O Canal (Milepost 99.65) & WM Railroad, Williamsport, MD

Find maps of Williamsport, MD


Created/Published
Documentation compiled after 1968.

Notes
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.

Subjects
Railroad Bridges
Wrought-iron Truss Bridges


Related Names
Bollman, Wendel
Patapsco Bridge & Iron Works


Collection
Historic American Engineering Record (Library of Congress)

Contents
Photograph caption(s): 
1. VIEW OF CAST-IRON MAKER'S PLATE, BOLTED TO TOP CHORD OF BRIDGE, MARKED '1879, W. BOLLMAN, BALTIMORE.'


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