- Agrium Conda: Phosphate Mine in ID, U.S.A.
- Asarco: Gold & Copper Mines in AZ and NV, U.S.A
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- BHP Minerals: Copper Mines in the U.S.A and in Peru, S. America
- Calaveras: Limestone Quarries in CA, U.S.A.
- Compania Minera Disputada: Copper Mines in Chile, S. America
- Cyprus Minerals (now PD): Copper/Gold/Moly Mines in the U.S.A and S. America
- Diavik Diamond Mines: Diamond Mine in NWT, Canada
- EXXON Coal/ Intercor: Coal Mine in Columbia, S. America
- Kartchner Caverns: Caving Project in AZ, U.S.A.
- Kennecott Copper Corporation: Copper Mine in UT, U.S.A.
- Las Encinas S. A.: Iron Mines in Mexico
- Minera del Norte: Iron Mines in Mexico
- Minera Los Pelambres: Copper Mine in Chile, S. America
- Phelps Dodge Corporation: Copper Mines in AZ and NM, U.S.A.
- Pinson Mining Company: Gold Mines in NV, U.S.A.
- P. T. Freeport Indonesia: Copper & Gold Mines in Indonesia
- Southern Peru Copper Company: Copper Mines in Peru, S. America
- SNIM: Iron Mine in Mauritania, Africa
- Teberebie Goldfields: Gold Mines in Ghana, West Africa
- U. S. Borax: Borax Mine in CA, U.S.A.
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