The Combination shaft Virginia City Nevada

The Combination Shaft began in 1875 when the owners of the Chollar-Potosi, Hale & Corcross and the Savage mines combined their efforts to sink a shaft to explore the Comstock Lode at a greater depth. The Combination was the deepest shaft ever sunk on the Comstock, reaching a depth of 3,250 feet. Low grade ore was found at this level, but proved to be of little value.