1570-060S_Midway_Geyser_0003.pdf

This file contains detailed historical documentation and engineering drawings for the Firehole River Bridge, constructed in 1911 in Yellowstone National Park's Midway Geyser Basin. The documents include a site map, north elevation, deck plan, portal view, section details, and exploded isometric views of structural connections. The bridge was built by the U.S. Army Corps of Engineers and is part of the Historic American Engineering Record (HAER), documenting significant early 20th-century infrastructure in a national park setting.

The technical drawings show a steel truss bridge with precise measurements, including a total length of 84 feet and a vertical height of 9.5 feet. The bridge features intricate structural components with detailed specifications for various elements like stringers, outer and intermediate channels, lattice work, and connection plates. The documentation provides a comprehensive technical and historical record of early 20th-century bridge engineering, highlighting the construction techniques and materials used in national park infrastructure during that era.