From the record
“The Hutchins Bridge, spanning the Madison River in Madison County, Montana near Cameron, Montana, was listed on the National Register of Historic Places in 1999.”
Wikipedia article Hutchins Bridge, CC BY-SA 4.0.
One of 18 National Register listings published here for Madison County · listed in 1999 · category: Structure · built in 1902.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service