COEUR D’ALENE, IDAHO — Hecla Mining Company (NYSE:HL) today announced preliminary silver and gold production results¹ for the first quarter of 2018. HIGHLIGHTS Silver production of 2.5 million ounces, and gold production of 57,808 ounces. Silver equivalent production of 10.7 million ounces and gold equivalent production of 134,903 ounces.2 Lead production of 5,627 tons; zinc production of 15,211 tons. Throughput at Casa Berardi continues at a record pace. Entered into agreement to acquire Klondex Mines Ltd, with 3 high-grade Nevada gold mines, potentially adding 162,000 ounces of annual gold equivalent production. Received $31.6 million investment (C$40 million) from Ressources Quebec, a wholly owned subsidiary of Investissement Québec. Cash, cash equivalents and short-term investments of approximately $245 million at March 31, 2018, an increase of about $32 million over March 31, 2017.