Canadian Mining Journal



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    Cementation sinks deepest shaft in the US

    May 30, 2016 by Canadian Mining Journal

    Mining contractor Cementation has sunk the deepest mine shaft in the United States. The record setting #4 shaft at Hecla Mining’s (NYSE: HL) Lucky Friday silver-lead-zinc mine in northern Idaho and plunges 2,922 metres (9,587 ft) below the surface. The shaft has a