Hecla Mining Company announced it has filed NI43-101 Technical Reports for the Casa Berardi mine in Quebec and Keno Hill mine in Yukon, Canada. Report Highlights: Keno Hill: Silver Proven and Probable reserves of 55 million silver ounces, an increase of 45% over the reserves identified at the time of the acquisition in September 2022, and an increase of 10% over year-end 2022. Reserves are calculated at a price assumption of $17 per ounce of silver.

Measured and Indicated resources are 34 million silver ounces, exclusive of reserves, and inferred resources are 32 million ounces, an increase of 5% and 25% over year-end 2022, respectively. 11-year reserve mine plan, silver production of 52.9 million ounces based on current reserves. Current reserves expected to generate $420 million of free cash flow with after-tax Net Present Value (NPV) of $305 million at $22 silver and 5% discount rate.

Casa Berardi: Gold Proven and Probable reserves decreased 21% to 1.3 million ounces due to the strategic decision to transition Casa Berardi to an open pit only operation. Reserves calculated at price assumption of $1,650 per gold ounce for open-pit and $1,850/oz for underground. Measured and Indicated gold resources of 0.8 million ounces, exclusive of reserves.

14-year open pit reserve mine plan with production of 1.04 million ounces of gold. Current reserves expected to generate $602 million of free cash flow over LOM with an after-tax NPV of $356 million at $1,950 gold price and 5% discount rate.