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Date: 2014-07-18 14:23:20Law Government Federal Mine Safety and Health Review Commission Mine Safety and Health Act Rulemaking United States Department of Labor Sago Mine disaster Upper Big Branch Mine disaster Mining Mine Safety and Health Administration Safety engineering | MSHA - Comments - Pattern of ViolationsAdd to Reading ListSource URL: www.msha.govDownload Document from Source WebsiteFile Size: 545,18 KBShare Document on Facebook |