This general area was mined for iron ore on a small scale before the Civil War.

In 1898, the Iron Belt Railroad and Mining Company, owned by L.S. Munford and J.W. Akin began large scale operations, which continued until 1902.

In 1902, the The Georgia Iron and Coal Company (formerly the Southern Mining Company), owned by Joel Hurt, mined the area on a smaller scale afterwards using convict labor. Some sources say it was mined until 1904, other say it was mined until the 1940's.

It was the northernmost stop on the Iron Belt Railroad.

This appears to be the Sugar Hill Mine Cut, which was eventually merged with the Kinsey Cut.

I imagine that the Sugar Hill Cut is the set of fragmented cuts on Sugar Hill proper, to the west and along the north side of the old rail bed and the Kinsey Cut is the contiguous cut to the east of the old rail bed. But, I'm not sure.