US Copper’s updated PEA estimates after-tax NPV of over $1bn
The study envisions a mine life of 14 years, producing 903,000 tonnes of copper, plus 12 million oz. of silver and 63,000 oz. of gold.
Canada-based RX Exploration has applied for an operating permit to expand a gold and silver mine northwest of Helena after regulatory officials became concerned the company was pushing the limits of its existing permit.
