Best Management Practices for Forest Road Construction and ...
Best Management Practices for Forest Road Construction and ...
Best Management Practices for Forest Road Construction and ...
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• Avoid logging during wet periods.• Use cross-drains <strong>and</strong> turnouts to remove water from roadsurfaces <strong>and</strong> ditches be<strong>for</strong>e reaching stream crossings.• Minimize stream crossings by good road planning. Follow the<strong>for</strong>est management plan.• Always cross streams at right angles.Types of CrossingsTypes of crossings that can be ordinarily used during <strong>and</strong> afterlogging include culverts, concrete slabs, rocked <strong>for</strong>ds, log ortimber bridges, <strong>and</strong> log <strong>and</strong> brush-lined <strong>for</strong>ds.Culverts. Use properly sized <strong>and</strong> installed culverts (Table 2 <strong>and</strong>Figure 8). Do not obtain culvert fill material from within thestream channel!Concrete Slabs <strong>and</strong> Rocked Fords. Depending on the soil,streambank <strong>and</strong> channel conditions, satisfactory crossingscan be made with low-water concrete slabs <strong>and</strong> rocked <strong>for</strong>ds(Figure 9). Concrete slabs are suitable <strong>for</strong> high-use permanentroads. Rocked <strong>for</strong>ds may be suitable <strong>for</strong> temporary <strong>and</strong> permanentroads, depending on use <strong>and</strong> local conditions.Bridges. Bridges vary in expense <strong>and</strong> design, depending onstream channel conditions, expected use, <strong>and</strong> whether or nota road is temporary or permanent. “Portable” bridges workwell on temporary roads that cross small streams. Inexpensivelog or timber bridges (Figure 10) may be suitable <strong>for</strong> temporaryor permanent roads.Log <strong>and</strong> Brush-Lined Fords. The use of brush or cull logs toarmor temporary stream crossings is a common <strong>and</strong> inexpensivepractice suitable <strong>for</strong> minor hillside channels.Promptly remove all material from the channels when loggingis completed.20