Hecla Mining Company is engaged in discovering, acquiring, developing, producing and marketing silver, gold, lead and zinc. The Company operates in three segments: the Greens Creek unit, the Lucky Friday unit and the Casa Berardi unit. The Company produces zinc, lead and bulk concentrates at its Greens Creek and Casa Berardi units. The unrefined gold and silver bullion bars (dore), which are produced at Greens Creek are sold directly to customers or further refined before sale to precious metals traders. It also produces lead and zinc concentrates at its Lucky Friday unit, which it sells to smelters on contract. The concentrates produced at its Greens Creek and Lucky Friday units contain silver, zinc and lead. The concentrates produced at Greens Creek contain payable gold. The Greens Creek property includes approximately 639 unpatented lode mining claims, 58 patented lode claims and one patented mill site.