In its latest assessment of 250 mine sites, the Responsible Mining Foundation found that that commitments are commonplace, yet basic actions are rarely evident.

Its "de-bottlenecking plan" will increase the combined design processing capacity of the concentrator plants.

BofA sees long-term copper supply challenged amid a lack of development.

The copper, nickel and precious metals venture in Sudbury, Ontario, had its operations halted in September.

Biden himself has said little about why his administration has blocked some mines while touting the need to boost domestic production of critical minerals.

The de-bottlenecking project has an estimated cost of approximately $50 million and is expected to take about 12 months to complete.

As planned, the Tower and Rail project would produce an average of 12,000 t/y copper-equivalent at an all-in sustaining cost of $2.46/lb copper.