Tilden Iron Mine, Michigan

Upper Peninsula iron ore mine that has the capacity to produce eight million tons of iron ore pellets annually, one of the largest producers in the world. A 1,400-acre reservoir and a similarly sized tailings basin were constructed in the area for the mine. The ore reserves are owned by Cleveland-Cliffs Inc., who also own or co-own three additional iron ore mines in Minnesota. All of the mines are located near the Great Lakes, in order to facilitate the shipment of ore pellets to their customers, who then use the pellets to produce steel.