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15. Avoid undercutting unstable, moisture laden toe slopes when 

 locating roads in or near valley bottoms. 



16. Vary road grades where possible to reduce concentrated flow in 

 road drainage ditches and culverts and to reduce erosion on 

 the road surface. 



B. Road Design and Construction 



1. Build minimum adequate road commensurate with traffic speed, 

 safety requirement and erosion hazards. Reduced speeds and 

 alternative safety measures (restricted road use) may be desirable 

 in erosion hazard areas. Reduce road density where possible. 



2. Design road to make seasonal use needs and maintenance activities 

 compatible with minimizing erosion from the road. 



3. Incorporate corrective action into plans. Use available soils 

 information as a guide. 



4. Balance cuts and fills to provide a minimum amount of disturbance, 

 erosion and/or water turbidity. Compact fills to avoid loss of 



fill material. Slope cuts and fills to minimize erosion. Revegetate 

 (mulch if necessary) cuts and fills to minimize erosion. Design 

 drainage ditches, waterbars, culvert placement, etc. in such a 

 manner as to disperse runoff and minimize cut and fill erosion. 



5. Use full bench construction (no fill slope) where stable fill 

 construction is impossible. Haul excavated material to safe 

 disposal areas. Include waste areas in soil stabilization planning 

 for the road. 



6. Where full bench construction is impractical, properly designed 

 retaining walls provide an effective but costly alternative to hold 

 fill material. 



