Approach
Increase resilience of road system infrastructure to higher peak flows. Focus on stream crossings, and roads within 300 feet of channels.
Tactics
- Increase size of drainage structures; plan for greater than 100-year events
- Install more bridges and open bottom culverts
- and use venting fill in floodplains.
- Plan for more decommissionings and re-routings; review historical closures/decommissionings for adequacy
- Reduce hydrologic connectivity of roads to the stream system by outsloping
- increasing rolling dips and cross culverts; improve surfacing
- especially at approaches to crossings.
Citation
Halofsky, J.E.; Peterson, D.L.; Ho, J.J.; Little, N.J.; Joyce, L.A., eds. (2018). Climate change vulnerability and adaptation in the Intermountain Region. Gen. Tech. Rep. RMRS-GTR-375. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station.,