The Black (Pugh's Mill) Covered Bridge, one of the few remaining covered bridges in southwestern Ohio and the only one in Butler County on its original site, was built in 1868-1869 to provide access to James B. Pugh's saw and grist mill on Four Mile (Tallawanda) Creek. The wooden frame three-story mill used a 16-foot overshot water wheel for power, but it ceased operation after two decades. Built by master builders Bandin, Butin, and Bowman, the bridge was among Ohio's longest and most impressive covered bridges and was notable for combining Childs and Long truss types in a single structure. Originally built as a cambered single span of 209 feet with a roadway width of 18 feet, it was modified in 1869 by adding a central pier for support, and the trusses were remodeled by replacing some wooden diagonals with iron rods so the bridge could be lowered onto the pier, eliminating the camber and creating two spans instead of one. The span's name gradually changed to Black Bridge, likely because a white covered bridge stood downstream near present State Route 73. The Oxford Museum Association assumed stewardship in 1976 as part of the American Bicentennial celebration, and the bridge was placed on the National Register of Historic Places in 1975, restored, and rededicated in 2000.