. . . . "Hecla Mining is a gold, silver and other precious metals mining company based in Coeur d'Alene, Idaho. Founded in 1891, is the second-largest mining company that produces silver in the country. This area is known as the Silver Valley (Idaho). In 1983, this entire area was designated as a Superfund site by the Environmental Protection Agency, because of land, water, and air contamination resulting from a century of mostly unregulated silver and gold mining."@en . . . . . . . . "Burke, Idaho, U.S."@en . . . . "Hecla Mining"@en . . . . "Hecla Mining logo.svg"@en . . . . "NYSE:HL"@en . "Hecla Mining is a gold, silver and other precious metals mining company based in Coeur d'Alene, Idaho. Founded in 1891, is the second-largest mining company that produces silver in the country. This area is known as the Silver Valley (Idaho). In 1983, this entire area was designated as a Superfund site by the Environmental Protection Agency, because of land, water, and air contamination resulting from a century of mostly unregulated silver and gold mining."@en . . . . . . . . . . . . . . . . . . . . . . . "1116427270"^^ . . . . . . "21689360"^^ . . . . . . . . . . . . . . . . . . . . "Hecla Mining Company"@en . . . . . . "1891"^^ . . "150"^^ . . . . . . . "Amasa Campbell, Patsy Clark, John Finch"@en . . . . . . . "10728"^^ . . . . . . . "Hecla Mining Company"@en . . . . "1891-10-14"^^ . . . . . . . . . . . .