Hecla Mining Company discovers, acquires and develops mines and other mineral interests and produces and market concentrates containing silver, gold and other metals, carbon material containing silver and gold, and unrefined dore containing silver and gold. Its segments include Greens Creek, Lucky Friday, Keno Hill, Casa Berardi and Nevada Operations. The Company produces zinc, silver and precious metals flotation concentrates at Greens Creek and silver and zinc flotation concentrates at Lucky Friday. At Greens Creek, it also produces gravity concentrate containing payable silver, gold and lead. It also produces unrefined gold and silver bullion bars (dore) and loaded carbon and precipitates at Casa Berardi, which are shipped to refiners before sale of the metals to precious metal traders. Keno Hill is located in the Keno Hill Silver District in Canada's Yukon Territory. Nevada Operations consists of four land packages in northern Nevada totaling approximately 110 square miles.