Gilleland Creek Railroad Bridge (TX) the 450 ft. timber railroad bridge was built before WWII. The replacement bridge utilizes Accelerated Bridge Construction techniques using precast concrete elements. The new bridge was constructed while the timber bridge in operation. Steel H-piles were designed to be driven between the existing rails and crossing planks. Precast concrete bent caps were designed to be slid into position while the existing timber deck in place. The new superstructure consists of precast concrete box beams. SDR provided structural design, plans production, and construction support.