Mercer’s Mill Covered Bridge. West Fallowfield-Sadsbury, Pennsylvania. Spanning Octoraro Creek—East Branch. Built in 1880 using the Burr Arch Truss system, the 103’ span is located in both Chester and Lancaster Counties.

Added to the National Register of Historic Places in 1980. The span has two World Bridge Numbers: 38-36-38 and 38-15-19.

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