From the record
“The Camp Beauregard Memorial, outside Water Valley, Kentucky on Kentucky state road 2422 northeast of town, marks the site of a Confederate States Army encampment named for General P. The camp was situated to protect the right flank of the Confederate encampment at Columbus, Kentucky.”
Wikipedia article Camp Beauregard Memorial, CC BY-SA 4.0.
One of 11 National Register listings published here for Graves County · listed in 1997 · category: Object · built in 1909.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service