The Thomas Mill Covered Bridge, aka the Thomas Mill Bridge or the Thomas Mill Road Covered Bridge, is a historic, single-span, wooden covered bridge across the Wissahickon Creek in Wissahickon Valley Park in Northwest Philadelphia, Pennsylvania. The 86.5-foot-long (26.4 m), 18.66-foot-wide (5.69 m), Howe truss bridge was built in 1855. It was renovated by the Works Progress Administration in 1939, and by the City of Philadelphia in 2000. The bridge is open to pedestrian traffic. * Bridge in 2010 * HABS drawing