Gaines Mill was one of the largest mills in Bartow County. Located 2 miles east of Kingston on 2-Run Creek, the mill was built around 1870 and sold by H.S. Crawford to Lewis Pendleton Gaines in 1879. Lewis partnered with his cousin, John Prince Lewis , operating as Gaines & Lewis. The 5-story building ground a million pounds of grain in 1880 alone. The W & A RR established a spur to the mill along with a depot called Cave.
In 1923, Wright & Flemister bought the re-named Eureka Mill with plans to continue milling, as well as producing electricity to the surrounding area. Flour production continued until 1910 and corn grinding until 1955.