Best Management Practices for Forest Road Construction and ...

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Figure 6. Design of Water BarsTable 4Recommended Water Bar Spacingfor Roads and Skid TrialsGrade of Road (%)Water Bar Spacing (feet)2 2505 13510 8015 6020 4525 4030 3540 3016
Turnouts or Wing DitchesTurnouts (Figure 7) provide drainage of ditch water from roadson ridges, points of ridges, and gentle sideslopes. On flat roads,turnouts provide drainage and help the road dry out.Turnout Installation• On sloping roads, use the spacing guidelines for cross-drainculverts (see Table 1).• Intersect the ditch line at the same depth and outslope oneto three percent.• Turn at a 30- to 40-degree downslope angle (with respect tothe road bed).• Place rock and slash at the outlet to prevent erosion whereneeded.• Do not outlet turnouts into stream channels.Mulching and SeedingTo reduce erosion and promote vegetation, mulch or slash shouldbe applied to highly erodible areas (Table 5). Apply mulch or slashto skid trails, new cut and fill banks, landings, or any other bareerodible soil near drainage channels. Seeding may be necessaryin some instances where immediate ground cover is desirable.17
Page 1 and 2: Best Management Practicesfor Forest
Page 3: ContentsIntroduction...............
Page 6 and 7: Figure 1. A typical Streamside Mana
Page 8 and 9: Decisions on whether or not to impr
Page 10 and 11: Road Cross-sectionsThe commonly use
Page 12 and 13: Table 1Recommended Spacing of Cross
Page 15 and 16: 13Figure 4. A Rolling Dip
Page 17: Road Grade (%)Table 3Drainage Dip S
Page 21 and 22: Table 5Recommended Dates for Seedin
Page 23 and 24: Figure 8. Installation of Stream Cr
Page 25 and 26: Figure 10. A Low-Cost Log and Plank
Page 27 and 28: HarvestingPlan ahead! Consult with
Page 29 and 30: Additional InformationOther forest
Page 31 and 32: BROKEN BOW, Southeast Area OfficeP.

Best Management Practices for Forest Road Construction and ...

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