The Great Shaft was one of two primary vertical shafts of the The New Mine. The shaft is large, three meters across, and supports four lifts, one at each corner and tw ore conveyors and two water pumps in the center of each wall. The lifts are powered by primitive steam engines found in New - The Engine Room nearby.
A great fan three meters in diameter dominates the top of the shaft, forcing air down into the stagnant mine.
An access ladder lies along the west wall.
The Great Shaft is over 300 feet deep, though currently the bottom of the mine is flooded.