Polymet Mining NorthMet Project SignCliffs Erie, Iron Range, Mining, Minnesota, NorthMet Project, Polymet Mining A sign at the PolyMet Mining NorthMet Project. Captured on May 2, 2021. © Chad Davis | chad@chaddavis.photography Filed Under: Cliffs Erie, Iron Range, Mining, Minnesota, NorthMet Project, Polymet Mining Related posts: LTV Steel Mining Company Sign Polymet Mining Company/Glencore mine in Hoyt Lakes Northern Lights in Minnesota May 10, 2024 Tornado Damage, Hugo Minnesota 2008 Line for COVID vaccine COVID-19 Minneapolis Convention Center