From the record
“The County Road I-39-Rapid River Bridge is a bridge located on County Road I-39 over the Rapid River in Masonville Township, Michigan. It was listed on the National Register of Historic Places in 1999.”
Wikipedia article County Road I-39-Rapid River Bridge, CC BY-SA 4.0.
One of 15 National Register listings published here for Delta County · listed in 1999 · category: Structure.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service