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3. Roads should climb away from channel crossings in both directions 

 wherever practical so high water will not flow along the road 

 surface. Surface sloped sections of the road if necessary to 

 reduce sediment movement directly into the stream. 



4. Where adequate maintenance can be assured, install open top culverts 

 or dips in the road surface to direct road runoff on to filter 

 strips rather than directly into the stream. 



5. Use rip-rap (placed rock), masonry headwalls, or otherwise protect 

 embankment and and channel sides at drainage structures. 



6. Increase the capacity of bridges or culverts in areas where debris, 

 sediment, or both types of problems exist. In extreme situations, 

 this may mean doubling the capacity of the structure. 



7. Frequently maintained trash racks (grates) over the inlet end may 

 be useful where floating debris tends to plug culverts. 



8. If at all possible, use bridges in areas where debris problems are 

 severe and fords are impractical. Otherwise it may be necessary 

 to construct rock - or gabion-protected fills with a dip to allow 

 overflow in the event that culvert capacity is lost. 



9. Submit design to appropriate governmental agencies and obtain all 

 necessary permits for stream crossing before beginning any activities; 

 utilize trained personnel available to help with plans (S.C.S. and 

 Montana Fish and Game). 



Drainage Along the Roadway 



Drainage is needed along the roadway to remove water before it has a 



chance to concentrate and cause erosion. To help accomplish this. 



