From the record
“The Rairden Bridge is a Pennsylvania through truss near Manderson, Wyoming, which crosses the Big Horn River. The bridge was built in 1916 by the Monarch Engineering Company.”
Wikipedia article Rairden Bridge, CC BY-SA 4.0.
One of 16 National Register listings published here for Big Horn County · listed in 1985 · category: Structure.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service