An illustration of mine workers refining iron ore.

Iron Workers

An illustration of mine workers refining iron ore.

An illustration of a miners loading a mine cart with iron ore in St. Louis, MO.

Mining

An illustration of a miners loading a mine cart with iron ore in St. Louis, MO.

An illustration of an iron ore mine dumb in St. Louis, MO in 1874.

Mining Dump

An illustration of an iron ore mine dumb in St. Louis, MO in 1874.