- US 281 Bridge at the Brazos River - Santo TXThe US 281 Bridge at the Brazos River is a through truss bridge consisting of one three-span continuous unit 656 1/2 feet long and 12 steel I-beam approach spans, each 40 feet long, for an overall length of 1,138 feet.The three spans form a continuous Warren truss with top chords resembling the curve seen in suspension bridges The bridge provides a crossing over the Brazos River on U.S. Highway 281 in southeastern Palo Pinto County. By September 1938, the Brazos River bridge project had been placed on the 1939 Regular Federal Aid Program. Texas Highway Department engineers designed the bridge. The...