(mm)
(in.)
18
450
16
400
HEMTT Left Ruts
HEMTT Right Ruts
14
350
12
300
10
250
8
200
6
150
4
100
2
50
0
0
Chunkwood
Tire
Slash
Control-
Control-
Polyrock
DS
a. Sloped trail.
Chips
North
East
Geonet
(mm)
(in.)
40
1000
(1) Section leveled by dozer after 15 passes
900
Left Rut
35
(2) HEMTT stuck at pass number 15
Right Rut
* Section was repaired after M60 trafficking
** Chunkwood (left) and chunkwood/geotextile pillow (right)
800
30
700
25
600
20
500
400
15
300
10
200
5
100
0
0
b. Wooded trail.
(mm)
(in.)
35
800
Left Rut
30
Right Rut
700
25
600
20
500
400
15
300
10
200
5
100
0
0
Chunkwood
Polyrock with
Slash
Tire Chips
c. Pentagonal loop trail.
Gravel
Figure 11. Rut depths.
18
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