From the record
“Blue Ball Church, in Hardin County, Kentucky near Howe Valley, was built in 1849. It was listed on the National Register of Historic Places in 1988.”
Wikipedia article Blue Ball Church, CC BY-SA 4.0.
One of 89 National Register listings published here for Hardin County · listed in 1988 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service