Mining ceased when Union troops destroyed the copper refinery and mill at Cleveland, Tennessee in 1863. Mining resumed in 1866, and continued until 1878, when the mines had exhausted the shallow high-grade copper ores.
Mining ceased when Union troops destroyed the copper refinery and mill at Cleveland, Tennessee in 1863. Mining resumed in 1866, and continue.d until 1878, when the mines had exhausted the shallow high-grade copper ores