APPENDIX C: CROSS-SECTIONAL PROFILES OVER TIME OF
THE PEGASUS RUNWAY INCLUDING FLANKING BERMS
Because of concerns about the long-term effect
difficult to remove beyond the existing berms and
of the concentration of construction spoil along
there is concern that the height of the berms will
increase each season of operation.
the flanks of the runway, we have performed
Our goal in generating the survey data was to
periodic surveys perpendicular to the long di-
document over time changes in the shape and
mension of the runway. The primary concern is
volume of the berms. From these data, the ap-
that the berms along the east and west sides of the
proximate rate of snow accumulation on the run-
runway will act to trap snow and increase the
way and in the immediate vicinity can be
local accumulation rate enough to make snow
calculated. Construction activities to shape the
management on the runway too labor intensive.
berms occurred during the interval over which
In addition, we are concerned how the shape of
we collected some of this survey data, particu-
the berms change (particularly the height-to-width
larly on the west flank.
ratio) as a result of removing the summer's pro-
tective snow cover from the runway. This snow is
20
Sta. 15 + 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 C1. Survey profile of the snow surface over time (looking south down the runway centerline) at the
1500-ft station on the runway.
20
Sta. 35 + 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 C2. Survey profile of the snow surface over time (looking south down the runway centerline) at the
3500-ft station on the runway.
20
Sta. 55 + 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 C3. Survey profile of the snow surface over time (looking south down the runway centerline) at the
5500-ft station on the runway.
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