From the record
“The West Antelope Bridge near Flora, North Dakota is a pin-connected Pratt pony truss structure that was built in 1907. It was listed on the National Register of Historic Places in 1997.”
Wikipedia article West Antelope Bridge, CC BY-SA 4.0.
One of 6 National Register listings published here for Benson County · listed in 1997 · category: Structure.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service
