CORESafety certified companies include:
Cloud Peak Energy Resources, LLC
Hecla Mining Company
Participating CORESafety companies include:
- Arch Coal, Inc.
- Barrick Gold of North America
- Coeur d'Alene Mines Corp.
- CONSOL Energy Inc.
- Contura Energy, Inc.
- Freeport-McMoRan Copper and Gold
- Hallador Energy Company
- J.R. Simplot Company
- Kinross Gold USA, Inc.
- Morton Salt
- Navajo Energy Transitional Energy Co.
- Newmont Mining Corporation
- North American Coal Corporation
- Prairie State Generating Company, LLC
- Rio Tinto Minerals
- Rio Tinto/Kennecott Utah Copper
- Rosebud Mining Company
- Stillwater Mining Company
- Teck American Incorporated
- Trapper Mining Inc.
- Twin Metals
- Usibelli Coal Mine, Inc.
- Warrior Met Coal
- Western Fuels Association, Inc.