From the record
“Fort Pringle is a historic artillery battery located at James Island, Charleston, South Carolina. It was built in 1863, as part of the James Island Siege Line and protect the Stono River, Johns Island and lower James Island.”
Wikipedia article Fort Pringle, CC BY-SA 4.0.
One of 227 National Register listings published here for Charleston County · listed in 1982 · category: Structure.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service