Twin Metals files suit against federal government for renewal of mineral leases
September 14, 2016
PolyMet submits first permits for proposed copper-nickel mine in Minnesota
July 12, 2016
Cliffs will reopen its United Taconite Mine two months ahead of schedule
June 9, 2016
Cliffs Natural Resources Inc. to restart production at Northshore Mine in Minnesota
March 14, 2016
More bad news for Twin Metals project in Minnesota
March 9, 2016
PolyMet gets approval of environmental review from Minnesota officials
March 4, 2016
Minnesota approves mining exploration leases
March 3, 2016
Law firm hired to represent Minnesota in legal action regarding PolyMet Mining raises concerns
December 7, 2015
Public comment period for PolyMet Mine’s EIS opens this week
November 9, 2015
Minnesota Gov. visits first of two mines while considering PolyMet project
October 29, 2015
Updated timeline for PolyMet mine presented
July 14, 2015
PolyMet mine in Minnesota clears one hurdle
June 29, 2015
Magnetation files for bankruptcy protection
May 6, 2015
Antofagasta acquires Duluth Metals for $85 million
November 4, 2014
Study finds Twin Metals mine in Minnesota would be economically feasible
August 22, 2014
Minnesota lawmakers oppose US-based loan to Australian mining project
November 15, 2013
Review of PolyMet mine delayed again
August 27, 2013
PolyMet eyes 2015 mining date
April 15, 2013
Minnesota approves iron ore mining lease
March 7, 2013
Cliffs plans to cut iron production
November 20, 2012