Bunker Hill Mining Corp. (CSE: BNKR, OTCQB: BHLL) shares rose over 8% on Tuesday after the company announced a new high-grade silver-lead discovery at its namesake mine in Idaho, extending mineralization beyond the known resource near existing infrastructure.
"This discovery of new high-grade silver-lead veins confirms our geological model and has the potential to significantly increase the resource base of the Bunker Hill Mine," Sam Ash, CEO of Bunker Hill, said in a statement. "The proximity to existing infrastructure is a major advantage."
The company's second drill intercept, hole BH-26-02, returned assays of 1,200 grams per tonne (g/t) silver and 15% lead over a 3.5-meter interval. This follows a successful first intercept reported in April. The discovery comes as silver prices climbed 1.5% to $27.50 per ounce and lead prices on the London Metal Exchange rose 0.8% to $2,200 per tonne as of 1:00 PM EST.
The new mineralization is located in the "Cate-Eight Vein Target," an area previously underexplored but situated close to the mine's main shaft and processing facilities. This could allow for a faster and more cost-effective development timeline compared to a greenfield discovery. The company plans to follow up with additional drilling to define the extent of the new discovery, with a resource update expected by the end of 2026.
The high-grade nature of the discovery, particularly the silver content, is a significant development for Bunker Hill. The 1,200 g/t silver intercept is well above the average grade of the mine's current resource. For comparison, Hecla Mining's (NYSE: HL) nearby Greens Creek mine, one of the world's largest silver producers, reported an average silver grade of 473 g/t in its 2025 reserves.
The location of the discovery near existing infrastructure is a key factor in its potential economic impact. The company estimates that utilizing the existing mine workings could reduce the capital expenditure required to bring the new veins into production by as much as 40%.
The discovery at Bunker Hill comes amid a renewed interest in Idaho's Silver Valley, a historic mining district that has produced over 1.2 billion ounces of silver. With silver prices up over 20% year-to-date, mining companies in the region are increasing their exploration budgets. Bunker Hill's discovery is the latest in a series of positive exploration results from the area, suggesting that the Silver Valley may still hold significant untapped potential.
This article is for informational purposes only and does not constitute investment advice.
