1570-023P Gardner River High Bridge_Combined Plans 1938 1977 1989.pdf

This file contains historical design plans for the Gardiner River Bridge, located east of Mammoth Hot Springs in Yellowstone National Park, originally constructed in 1938. The bridge is a 905-foot-long steel truss structure supported by four reinforced concrete U-type abutments and three steel towers. It features a steel deck with a total width of 24 feet, designed with a parabolic roadway crown and symmetrical expansion joints. The bridge was designed by the Bureau of Public Roads and involves complex structural engineering, including detailed specifications for structural steel, concrete, reinforcing steel, and utility conduits. The design drawings include comprehensive technical details such as tower framing, deck plans, elevation views, bearing details, and reinforcement specifications, reflecting the advanced engineering practices of the late 1930s for national park infrastructure.