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Keys Bridge

Keyes Road Bridge

Keys Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: July 4, 2006

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Key Facts

Facility Carried / Feature Intersected
Keyes Road (TR-821) Over Raccoon Creek
Rural: Washington County, Pennsylvania: United States
Construction Date and Builder / Engineer
1903 By Builder/Contractor: Nelson and Buchanan of Chambersburg, Pennsylvania

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
58 Feet (17.7 Meters)
Structure Length
61 Feet (18.6 Meters)
Roadway Width
12 Feet (3.66 Meters)
1 Main Span(s)
NBI Number

Historic Significance Rating (HSR)
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Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

The official name of this bridge is spelled "Keys", while the road name is spelled "Keyes Road".

This is a very small pony truss with riveted connections, having only four panels. This bridge has lattice guardrails, unlike the other Nelson and Buchanan bridges in the county that have v-laced railings. The bridge sits on concrete abutments, which for Pennsylvania, is more unusual, since most bridges are on stone abutments. Although listed as a Pratt truss by the historic bridge inventory, you could call this a double-intersection Warren, since the diagonals are all the same size. It depends on whether you look at this bridge as a truss with counter diagonals at all panels (which would make the bridge a Pratt) or with all diagonals functioning as regular diagonal members (double-Warren).

Information and Findings From Pennsylvania's Historic Bridge Inventory

Discussion of Bridge

The single-span, 61'-long and 15' wide, riveted Pratt pony truss bridge built in 1903 is supported on concrete abutments. The trusses are traditionally composed, and the floor beams are located above the lower chords. Although the bridge appears to be complete, it is located in a county and region noted for its numerous complete truss bridges, and it is not historically or technologically significant. It is similar to other bridges in the county from the same period that were fabricated by Nelson & Buchanan.

Discussion of Surrounding Area

The bridge carries one lane of a two-lane road over a stream in a sparsely developed, wooded setting.

Bridge Considered Historic By Survey: No


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