Figure 38. Mineral matter trapped in the ice.
Figure 39. Ice surface following initial grading.
emergency, or rapid change in weather (tempera-
best to first select the grader(s) needed to effi-
ture or wind direction), or if there is a need to
ciently produce the glacial ice runway in the time
discuss progress. Also, matched performance al-
period desired and then to determine the
lows the operators to start and finish work cycles
snowblower(s) that will be compatible. We esti-
on the same timetable so that they can share
mate that 37 kW (50 hp) of snowblower power is
breaks, meals, and transportation. It is probably
needed to match each foot of grader blade.
38
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