All underground mining machine operators not listed separately.

Separate blocks of rough dimension stone from quarry mass using jackhammers, wedges, or chop saws.

Assemble or repair oil field equipment using hand and power tools. Perform other tasks as needed.

Help extraction craft workers, such as earth drillers, blasters and explosives workers, derrick operators, and mining machine operators, by performing duties requiring less skill. Duties include supplying equipment or cleaning work area.

All extraction workers not listed separately.