One of my friends actually found this graveshelter by accident, and we rode out to visit: the Halls Chapel graveshelter in Weaver, Alabama:
It’s a carport-style structure. That’s over 60 cemeteries with graveshelters in Alabama that I’ve been able to document, and many more actual graveshelters, as some have multiple structures. If you do come across one, please contact me so I can make a site visit. Thank you so much!