Mountain Iron Mine

Mountain Iron Mine is a former mine in Mountain Iron, Minnesota, United States. Opened in 1892, it was the first mine on the Mesabi Range, which has proved to be the largest iron ore deposit ever discovered in the United States. Mining operations at the site ceased in 1956. The bottom of the open-pit mine has filled with water but its dimensions are readily visible. The city maintains an overlook in Mountain Iron Locomotive Park. Mountain Iron Mine was proclaimed a National Historic Landmark in 1968 and subsequently listed on the National Register of Historic Places for its national significance in the theme of industry. The property was nominated for setting in motion the extraction of iron ore on the Mesabi Range, which helped make Minnesota the nation's largest iron producer and the United States the world's largest steel manufacturer.

Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).