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Figur<br />
igure 7.4 Culvert cross-drains.<br />
Inlet<br />
Structure<br />
as Needed<br />
Spacing 30–150 m<br />
Berm<br />
0 o -30 o<br />
Place Outlet Pipe at<br />
Natural Ground<br />
Level or Riprap<br />
Armor the Fill<br />
Material.<br />
Figur<br />
igure e 7.5 Water bar construction. (Adapted from Wisonsin’s Forestry Best Management Practices<br />
for Water Quality. 1995, Publication FR093, Wisconsin Department <strong>of</strong> Natural Resources)<br />
Berm Tied into<br />
Embankment<br />
Spacing 10–75 m<br />
0-25 o<br />
Exit onto Stable<br />
or Armored<br />
Ground<br />
a. Perspective View<br />
30-60 cm 30-60 cm<br />
Road Grade<br />
1 - 2 m 1 - 2 m 1 - 2 m<br />
b. Cross-Section<br />
LOW-VOLUME ROADS BMPS : 59
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