At the Quincy Mine Shaft No. 2, the Rock House is where the cars of ore, and miners, were pulled up from the depths of the worlds deepest shaft with a series of pullies connected to the hoist, which is housed in a separate building. The building that houses the largest steam-driven hoist in the world (not shown here) was spared no expense, and sat on the largest concrete slab ever poured at the time, containing 3200 cubic yards of cement and over 8 tons of reinforcement. The Photo by Kathy Weiser-Alexander.