Road Survey
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Ditch
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Diverts water flow
off road and away
from body of water
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U-shape, do not
exceed depth:width
ratio of 2:1
DITCH:
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Use proper soil, grass, shrubs and stones to avoid erosion
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Keep ditch free of debris
Culvert
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Water bar is a ridge (like a speed bump)-->stops water from running down road and diverts it to the side
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Rubber bar: best for seasonal and driveway use b/c susceptible to plow damage
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Set in ground at 30 degree downslope with pitch of 2-4%
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Have 1in. crown for every 10 ft. culvert length
