This is Westmoreland County's only surviving wood truss bridge. Spanning Sewickley Creek, the ninety-five-foot-long and fourteen-foot-wide structure is covered with a lowpitched gable roof, and features pediments and Tuscan piers at the portals. Burr's truss system was patented in 1804. Here, McCain added arches to the multiple kingpost truss to create a longer and stronger bridge. Modern engineers believe that the multiple king-post truss is a system for keeping Burr's slender arches properly aligned and preventing them from buckling. Daniel McCain (1810–1891) was for a time the superintendent of bridge construction in Allegheny County, working on the Ninth Street ( AL13), Sixteenth Street ( AL80), and 43rd Street bridges in Pittsburgh, as well as bridges for the Pennsylvania and West Penn railroads. Transportation advances have caused demolition of similar bridges on well-traveled roads of the commonwealth. In the late 1980s, the Beamery, a local firm known for reconstructing historic structures, made extensive repairs to this bridge. Nearby are the stone Sewickley Presbyterian Church of 1831 and a large, red brick, five-bay house at 211 Bells Mills Road.
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Bells Mills Covered Bridge
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