This month, Perpetua’s modified mine plan was identified as the preferred alternative due to improvements in water quality and temperature and site access benefits. 

The 2022 PEA also assesses the royalty's impact on the projected results for the three potential mine expansion scenarios.

A firmer dollar, higher inventories and profit-taking pushed copper prices lower later in the day.

Clean energy contract will mitigate about 1.6 million tonnes of annual greenhouse gas emissions, equivalent to removing over 340,000 combustion engine passenger vehicles from the road.

The dollar fell sharply on Thursday after US consumer prices rose less than expected last month.