From the record
“The Lewis and Clark Bridge is a historic bridge in Wolf Point, Montana, which once carried Montana Highway 13 across the Missouri River between McCone and Roosevelt counties. It is also known as Wolf Point Bridge, Missouri River Bridge, or Site No. 24RV438.”
Wikipedia article Lewis and Clark Bridge (Wolf Point, Montana), CC BY-SA 4.0.
One of 2 National Register listings published here for McCone County · listed in 1997 · category: Structure · built in 1930.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article