The mine.27s engineering achievements Quincy Mine

quincy mine hoist house

when mine ceased production in 1945, quincy number 2 shaft world s longest mine shaft, @ 9,260 feet (2.82 km or 1.75 miles) along dip of deposit on 55 degree decline. (measured vertically shaft collar, depth 6,200 feet.) raise , lower ore , workers shaft, world s largest steam-driven mine hoist built in 1918 , housed in quincy number 2 hoist house. nordberg steam hoist , reinforced concrete building, built in georgian architectural style brick veneer , italian-tiled walls, cost on $370,000 in 1918 used eleven years until ceased usage in 1929. weighing more 880 tons, lifted 10 tons of ore @ 36.4 miles per hour, saving $16,080 in fuel bills in first year of operation. hoist sat on largest concrete slab ever poured, containing 3200 cu. yards of concrete , on 8 tons of reinforcement material. number 2 hoist house built reinforced concrete structure on scale rare 1918, making 1 of first of kind decorative hoist house used showpiece visiting investors.