There isn’t a whole lot of information online about this school.
Flat Gap Elementary School is located about 10 miles south of Sneedville at the intersection of Tennessee state route 31 and 131 in the community of Treadway, very close to the Grainger County line.
My estimates are that the school opened in the 1950s and probably closed around 2001 when Hancock County closed the outlying schools in favor of one centralized elementary school in Sneedville.
After the school was closed the facility was used as some sort of canning factory. That factory has since closed and the school is now home to the Appalachian Service Project.
As always if you have any information or stories about this school, please feel free to comment or message me and thanks for reading!