National Road S-bridges

New Concord S-bridge

Guernsey County S-bridge

Blaine S-bridge & Blaine Hill Viaduct

They are not metal but eastern Ohio is home to these three restored masonry arch S-bridges on the Old National Road (later Rt 40). The Blaine bridge is the oldest in Ohio (1828) and is part of a trio of adjacent bridges two of which are visible in the lower picture. The S-bridge carried the National Road and is now closed to traffic. The Viaduct seen in the background carries Rt 40 and just behind it (not visible) is another bridge that carries I-70.

The bridges are S-shaped so that they cross the waterway with the shortest span.