EP 1110-1-8
(Vol. 6)
31 July 03
APPENDIX C
GUIDE FOR SELECTING OPERATING CONDITIONS (Continued)
EQUIPMENT TYPE
AVERAGE
SEVERE
G15:
Graders, Motor
Haul road maintenance;
Maintenance of hard-
road construction,
packed roads with
ditching; loose fill
embedded rock; heavy fill
spreading; landforming,
spreading; ripping
landleveling; summer
scarifying of asphalt or
road maintenance with
concrete; continuous high
medium to heavy winter
load factor; and high
snow removal; and
impact.
elevating grader use.
Depreciation Period:
14,500 hours
13,500 hours
H25:
Hydraulic Excavators
Mass excavation or
Continuous trenching or
Crawler Mounted
trenching where machine
truck loading in rock or
digs all the time in natural
shot rock soils; large
bed clay soils; some
amount of travel over
traveling and steady, full
rough ground; machine
throttle operation; and
continuously working on
most log loading
rock floor with constant
operations.
high load factor and high
impact; and saltwater
environment.
Depreciation Period:
8,500 - 19,000 hours
7,000 15,000 hours
H30:
Hydraulic Excavators
Continuous digging in
Continuous digging in
Wheel Mounted
sandy clay/sandy gravel,
rock/natural bed clay,
site development, and
high impact, using
lumber yard applications.
hammer, and working in
forests or quarries.
Depreciation Period:
8,000 - 10,000 hours
6,500 - 8,000 hours
C-2
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