Both iron ore and diamond output rose in the first quarter thanks to a continued ramping-up of the company's Minas Rio mine in Brazil and improvements in the gem market.
The miner had to put its plans on hold because the Police Service of Northern Ireland said it cannot secure daily anti-terrorism cover for its blasting operations at Omagh gold mine.
Imperial Metals (TSX:III) has been granted a water discharge permit from the B.C. government that will allow the company to flow treated mine wastewater from the Mount Polley mine into Quesnel Lake.