Figures C1C5 depict the snow surface profile
stabilized. Use of heavy equipment to reshape
extending out 140 m (450 ft) to the east and west
and spread out the west berm has caused its shape
from the centerline of the runway. Profiles were
to change significantly over the span of time cov-
taken between 20 October 1993 and 21 January
ered by these profiles. Without calculating vol-
1995 at the 1500-ft, 3500-ft, 5500-ft, 7500-ft, and
umes, it is difficult to tell whether there has been
9500-ft stations along the runway (distance is mea-
any change in the quantity of snow present along
sured from the north end of the runway). The
this side of the runway. However, clearly the west
cross sections are shown looking south (east is to
berm is higher than that on the east and that the
the left in Fig. C1C5).
west berm has a shallower slope on the runway
It is clear from the profiles that the east side of
side than on the outside slope. Since the zone of
the runway is fairly stable, from 1994 on, along
ablation is not far distant from the west berm,
the entire length of the runway. Since the prevail-
and prevailing winds are from the east, this west
ing wind is from the east and it often carries snow
berm may not be as threatening as it first appears.
from the accumulation zone, it is fortunate that
Efforts to reduce and reshape the west berm to
the east berm's shape and height appear to have
look more like the east berm are advisable.
20
Sta. 75 + 00
20 Oct `93
25 Nov `93
9 Jan `94
16
8 Mar `94
22 Oct `94
21 Jan `95
12
8
C
L
450
400
350
300
250
200
150
100
50
50
100
150
200
250
300
350
400
450
Distance (ft)
Figure C4. Survey profile of the snow surface over time (looking south down the runway centerline) at the
7500-ft station on the runway.
20
Sta. 95 + 00
20 Oct `93
25 Nov `93
9 Jan `94
16
8 Mar `94
22 Oct `94
21 Jan `95
12
8
C
L
450
400
350
300
250
200
150
100
50
50
100
150
200
250
300
350
400
450
Distance (ft)
Figure C5. Survey profile of the snow surface over time (looking south down the runway centerline) at the
9500-ft station on the runway.
114
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