From the record
“The Lewis Bridge over the Keya Paha River is a historic bridge listed on the National Register of Historic Places in 1992.”
Wikipedia article Lewis Bridge (Keya Paha River), CC BY-SA 4.0.
One of 2 National Register listings published here for Keya Paha County · listed in 1992 · category: Structure.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service