Salt Fork S Bridge

Ohio

Built 1828
Total Length 55'
Main Span 40'
Status Active - Pedestrian

The Salt Fork S Bridge, a masonry S bridge built in 1828, formerly carried U.S. Route 40 over Salt Fork Creek east of Old Washington, Ohio.

The crossing is one of several masonry S bridges built in Ohio and Pennsylvania, and it contains a 40-foot stone arch span over the creek, set on a line perpendicular to the stream’s flow, while the roadway curves on either side of the arch. 2 Built of cut stone laid in courses of one foot or more, the S Bridge originally had a brick floor. 1 Its distinctive S-shaped form is both unusual and practical. The curves ease the approaches to the crossing, reduce the length of arch needed to span the stream, avoid steeper grades, and help protect the backfill from erosion.

The S Bridge was bypassed when U.S. Route 40 was realigned in 1932. In 1936, the Ohio Chapter of the Daughters of the American Revolution persuaded the Ohio Highway Department to route the road around the old structure rather than replace it with a new bridge. 1

In 1965, the Salt Fork S Bridge was designated a National Historic Landmark. The bridge was rehabilitated in 2005.

Dimensions & Classification

Structural FormArch — Stone
Primary MaterialStone
Total Length55'
Main Span40'
Deck Width31'
Roadway Width26'

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References for this location, in MLA format.

  1. Loveday, Amos J. Jr. “S” Bridge II. National Register of Historic Places, National Park Service, July 1972.
  2. “Ohio Department of Transportation.” Ohio Department of Transportation,