From the record
“Grace Pegram Truss Railroad Bridge is a Pegram through truss bridge over the Bear River near Grace, Idaho.”
Wikipedia article Grace Pegram Truss Railroad Bridge, CC BY-SA 4.0.
One of 14 National Register listings published here for Caribou County · listed in 1997 · category: Structure · built in 1894.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service