- Black Pine Mining, Inc., Idaho
- BP America, New Mexico
- Coeur-Rochester, Inc., Nevada
- Collahuasi, Chili
- Cortez Gold Mines, Nevada
- Equatorial Tonopah, Nevada
- Getchell Gold Corp., Nevada
- GHK Company, Columbia
- Gold Corp. Red Lake Mine, Ontario, Canada
- Golden Sunlight Mines, Montana
- Independence Mining Company, Nevada
- Kennemetal, Inc., Nevada
- Kinross Delamar, Idaho
- Lac Minerals, South Dakota
- Nevada Gold Fields, North Carolina
- Newmont Mining, Nevada and Bolivia
- Phelps Dodge Mining Co., Arizona
- Placer Dome, Montana
- Round Mountain Gold Corp., Nevada
- Stillwater Mining Co., Montana
- Yerington Copper, Nevada
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- Anticline, Utah
- BHPBilliton, Utah
- Brennan Bottom Disposal, Colorado
- CMS Energy, Inc., Wyoming
- Continental Industries, Utah
- Dalbo Trucking, Colorado
- Devon Energy, Wyoming
- Eagle Springs Oil, Nevada
- Encana Oil, Colorado
- Exxon Mobil Corporation, Colorado/Wyoming
- First Source Energy, Wyoming
- FMC, Wyoming
- Lance Oil Company, Wyoming
- Nebekkar Trucking, Wyoming
- Northwest Energy, Wyoming
- Ourhoud Oil Company, Algeria
- OMG Apex, Inc., Utah
- Pennaco Energy, Wyoming
- Queensland Gas, Brisbane, QLD Australia
- Western Cleanup, Colorado
- Western Gas Company, Wyoming
- Williams Field Services, Colorado
- Yates Petroleum Corp., Wyoming
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- Ainsworth Lumber, Alberta, Canada
- Chempure, India
- City of Abiline, Texas
- CMS Energy, Inc., India
- City of Abiline, Texas
- Island Park County, Idaho
- Mexico Farms, Maryland
- Monitor Sugar Company, Michigan
- Otter Tail Power Company, South Dakota
- Quad County Corn Proc., Iowa
- Salton Sea, California
- Swift and Company, Utah
- West Fraser Lumber, Alberta, Canada
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