- Boring test holes for nonmetallic minerals, except fuels: on a contract basis
- Draining or pumping of nonmetallic minerals mines, except fuels: on a contract basis
- Drilling for nonmetallic minerals, except fuels: on a contract basis
- Exploration for nonmetallic minerals, except fuels: on a contract basis
- Geophysical exploration services, for nonmetallic minerals, except fuels: on a contract basis
- Mine development for nonmetallic minerals, except fuels: on a contract basis
- Overburden removal for nonmetallic minerals, except fuels: on a contract basis
- Shaft sinking for nonmetallic minerals, except fuels: on a contract basis
- Strip mining for nonmetallic minerals, except fuels: on a contract basis
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