More information from O*NET OnLine:

Excavating and Loading Machine and Dragline Operators, Surface Mining - 47-5022.00

O*NET-SOC Description

Operate or tend machinery at surface mining site, equipped with scoops, shovels, or buckets to excavate and load loose materials.

47-0000	Construction and Extraction Occupations
47-5000	Extraction Workers
47-5020	Surface Mining Machine Operators and Earth Drillers
47-5022.00	Excavating and Loading Machine and Dragline Operators, Surface Mining

47-2061.00	Construction Laborers Bright Outlook
47-2072.00	Pile Driver Operators
47-2073.00	Operating Engineers and Other Construction Equipment Operators
47-5041.00	Continuous Mining Machine Operators
47-5044.00	Loading and Moving Machine Operators, Underground Mining
49-3042.00	Mobile Heavy Equipment Mechanics, Except Engines
49-9043.00	Maintenance Workers, Machinery
53-7021.00	Crane and Tower Operators
53-7041.00	Hoist and Winch Operators
53-7051.00	Industrial Truck and Tractor Operators

Adjust dig face angles for varying overburden depths and set lengths.
Become familiar with digging plans, machine capabilities and limitations, and efficient and safe digging procedures in a given application.
Create or maintain inclines or ramps.
Direct ground workers engaged in activities such as moving stakes or markers, or changing positions of towers.
Direct workers engaged in placing blocks or outriggers to prevent capsizing of machines when lifting heavy loads.
Drive machines to work sites.
Handle slides, mud, or pit cleanings or maintenance.
Lubricate, adjust, or repair machinery and replace parts, such as gears, bearings, or bucket teeth.
Measure and verify levels of rock or gravel, bases, or other excavated material.
Move levers, depress foot pedals, and turn dials to operate power machinery, such as power shovels, stripping shovels, scraper loaders, or backhoes.
Move materials over short distances, such as around a construction site, factory, or warehouse.
Observe hand signals, grade stakes, or other markings when operating machines so that work can be performed to specifications.
Operate machinery to perform activities such as backfilling excavations, vibrating or breaking rock or concrete, or making winter roads.
Perform manual labor to prepare or finish sites, such as shoveling materials by hand.
Receive written or oral instructions regarding material movement or excavation.
Set up or inspect equipment prior to operation.