Taconite | Minnesota DNR
Taconite saved Minnesota''s iron ore mining industry. Learn more about Taconite from Minnesota History Center. The Hull Rust Moning Mine in Hibbing, Minnesota. World''s largest open pit iron ore mine; First ore shipments in 1895 (still being mined today, 114 years later) Originally 30 separate mines ; Total area: 1,591 acres; Total length: 3 1/2 miles; Greatest width: 1 1/2 miles; Greatest ...