21G: Quarrying
Specialist
Major Duties: The quarrying specialist supervises
or operates electric, pneumatic, and internal combustion powered
machines used in drilling, crushing, grading, and cleaning
gravel and rock, or detonates explosives to blast rock in
quarries and at construction sites. Duties for MOS 21G at
each level of skill are:
- Skill Levels
- Skill Level 1 MOSC 21G1O. Operates
rock drills under supervision. Assembles, adjusts and
operates crushing, screening, conveying, and washing
units. Assists in blasting operations. Assists in performance
of combat engineer missions.
- Skill Level 2 MOSC 21G2O. Directs
the erection of rock processing equipment. Determines
screen sizes and crusher settings to produce aggregate
to specifications. Directs quarry rock excavation to
produce required sizes and tonnage of rock. Performs
as blaster.
- Skill level 3 MOSC 21G3O. Conducts
and plans quarry reconnaissance and plant layout. Supervises
the setup and calibration of a rock processing plant.
Plans and supervises blasting operations. Supervises
rock production operations. Directs combat engineering
missions.
Physical demands rating and qualifications for initial
award of MOS. The quarrying specialist must possess the
following qualifications:
(1) Physical Demands Rating:
very heavy
(2) Physical Profile: 222221
(3) Normal color vision.
(4) Minimum score of 95 in aptitude
area GM.
(5) MOS qualification may be attained by meeting the civilian
acquired skills criteria listed in AR 601-210.
MOS 21G had the alphanumeric designator of 62G prior
to fiscal year 2004.
The major duties, physical demands, physical profile, and
skill levels were obtained from Army Pamphlet 611-21.
MOS List for Corps of Engineers
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