A Technical Manual for Landowners, Loggers, and ... - Forestry

R O A D S, S K I D T R A I L S , L A N D I NG S & S T R E A M C R O S S I NG S
R O A D S, S K I D T R A I LS , L A N D I NG S
& S T R E A M C R O S S I NG S
downhill end to allow water to be directed into nearby vegetation. Water bars
are difficult to drive over, and are easily rendered ineffective when subjected
to heavy traffic. Vehicle traffic should therefore be minimized and the water
bars should be seeded and fertilized to reduce erosion.
Figure 4.9 Water Bar Installation
Cross Section
1'
3.4'
3.4'
Table 4.1
Recommended Distances between Water Diversion Devices on Logging Roads
Road Grade (%)
3.4'
Spacing (feet)
2 250
5 135
10 80
30 O – 45 O 90 O
3% Water Outslope
Road Mainte n a n c e
One of the most important parts of road maintenance is keeping ditches
and culverts operational and free of debris. Ditches on newly constructed
roads may require frequent cleaning and checking after each major storm
until revegetation has been established. Road grading is another important
part of maintenance.
Recommended Practice Standards and Guidelines
■ Grade roads only as often as needed to maintain a stable road surface
and to maintain proper surface drainage. Unnecessary grading creates a
source of sediment from the newly disturbed surface.
■ Leave grass in the ditch unless it has filled with sediment and is no
longer functioning.
■ Avoid undercutting the toe of cut-slopes when grading roads or pulling
ditches. Clean ditches periodically.
■ Clean culverts blocked by debris.
■ Avoid leaving berms that channel water down the road.
■ Reduce dust by applying water, rock, or other appropriate
road treatments.
■ Close all roads that are unstable, erodible or unnecessary.
15 60
20 45
25 40
30 35
40 30
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