From the record
“The Ponca Creek Bridge, also known as NEHBS No. BD00-224, is a historic Pratt truss bridge spanning Ponca Creek that is listed on the National Register of Historic Places.”
Wikipedia article Ponca Creek Bridge, CC BY-SA 4.0.
One of 3 National Register listings published here for Boyd County · listed in 1992 · category: Structure.
Sources: the Wikipedia article · the National Register database, National Park Service