The Salado Walkpath Bridge is a lenticular truss bridge, a design patented in 1878 by William O. Douglass and built in 1889 by the East Berlin Iron Bridge Company of East Berlin, Connecticut, across Cowhouse Creek in Coryell County. Coryell County later moved the bridge to a crossing of Dodd's Creek. In 1995, it was declared functionally obsolete for vehicular traffic, and during the search for a pedestrian bridge to cross Campbell's Branch in Salado, the Texas Department of Transportation chose to renovate and use the structure. It was moved to its present location on July 29, 1997, as part of the Salado Walkpath Project. The bridge is one of eight remaining lenticular bridges west of the Mississippi River and one of twenty-four surviving in America. Its truss type takes its name from the lens shape formed when the longitudinal upper and lower parabolic chords intersect, and it combines arch bridge and suspension bridge properties in a single design that requires less steel than similar bridges. The Salado Walkpath was a joint effort of the Salado Chamber of Commerce and the Texas Department of Transportation, and the walkpath and bridge restoration project received TXDOT's State Environmental Achievement Award in 1998.