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Keystone Viaduct

Western Maryland Railway Bridge

Keystone Viaduct

Primary Photographer(s): Nathan Holth

Bridge Documented: July 6, 2014

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Location
Rural: Somerset County, Pennsylvania: United States
Structure Type
Metal 16 Panel Rivet-Connected Pennsylvania Through Truss, Fixed and Approach Spans: Metal Deck Girder, Fixed
Construction Date and Builder / Engineer
1911 By Builder/Contractor: Unknown
Rehabilitation Date
2003
Main Span Length
240.0 Feet (73.2 Meters)
Structure Length
910.0 Feet (277.4 Meters)
Roadway Width
Not Available
Spans
1 Main Span(s)
Inventory Number
Not Applicable

Historic Significance Rating (HSR)
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Bridge Documentation

This bridge crosses a variety of features. Typically, a bridge's main and most impressive span is the one over a body of water if one is present. However, with this bridge, the largest "main" span is the one over the railroad line. This span is a very impressive truss. Its span length combined with the fact that it was built with a wide width so as to handle two sets of tracks, the bridge has very massive members. The span is not skewed, although the tracks it passes over are skewed in their alignment. This is partly why the span is so long. Crossing a skewed line with a non-skewed span means a longer span is needed. This bridge was designed to handle two sets of tracks, but this never happened. The truss was built to handle two tracks. In contrast, with the deck plate girder approach spans, the piers were built to support two tracks, but only enough girders were erected on the piers to handle one track. If the railroad had wanted to expand, they would have simply added more girders at that time. Today, the bridge serves a rail-trail. Only half of the truss roadway is used for the path.

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Maps and Links: Keystone Viaduct

Coordinates (Latitude, Longitude):

Search For Additional Bridge Listings:

Bridgehunter.com: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

Bridgehunter.com: View listed bridges within 10 miles (16 kilometers) of this bridge.

HistoricBridges.org Bridge Browser: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

HistoricBridges.org Bridge Browser: View listed bridges within 10 miles (16 kilometers) of this bridge.

2021 National Bridge Inventory: View listed bridges within 0.5 miles (0.8 kilometers) of this bridge.

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