Built in 1887, the Harris Ford Bridge crossed Big Pine Creek, providing Warren County citizens a crossing that connected Attica with coal fields near Carbondale and carried traffic for 113 years until a concrete bridge replaced it in 2000. Built by the Lomas Forge and Bridge Works of Cincinnati, Ohio, at a cost of $18.50 per lineal foot, it uses a Pratt Truss, a form patented in 1844 by Thomas and Caleb Pratt that includes vertical members, unlike a true Warren Truss, patented in the 1840s, which uses equilateral triangles. The bridge is an iron truss bridge made of wrought iron, a heated but not melted iron whose remaining silicate slag helps resist corrosion and whose higher tensile strength made it better suited than cast iron for longer spans and heavier loads. Iron bridges began replacing wooden covered bridges in the mid-1800s because they did not need protective covers and did not burn as wooden railroad bridges often did, and from 1850 until 1925 the iron truss bridge was the most common bridge built. Moved from near Attica to Bloomington, the bridge was restored and relocated in 2003 with assistance from the Indiana Department of Transportation, the Friends of the Limestone County Trail, and the Historical Landmarks Foundation of Indiana, and it now serves as a pedestrian bridge.