Quincy Mine - The Mine's Engineering Achievements

The Mine's Engineering Achievements

When the mine ceased production in 1945, the Quincy Number 2 shaft was the world's deepest shaft, at 9,260 feet (2.82 km or 1.75 miles) along the dip of the deposit on a 55 degree decline. To raise and lower ore and workers into this shaft, the world's largest steam-driven mine hoist was built in 1918 and housed in the Quincy Number 2 Hoist House. The Nordberg Steam Hoist and its reinforced concrete building, built in the Georgian architectural style with brick veneer and Italian-tiled walls, cost over $370,000 in 1918 but was used for only eleven years until it ceased usage in 1929. Weighing more than 880 tons, it lifted 10 tons of ore at 36.4 miles per hour, thus saving $16,080 in fuel bills in its first year of operation. The hoist sat on the largest concrete slab ever poured, containing 3200 cu. yards of cement and over 8 tons of reinforcement material. The Number 2 Hoist House was built as a reinforced concrete structure on a scale rare for 1918, making it one of the first of its kind The very decorative Hoist House was used as a showpiece for visiting investors.

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