Risky Business: Identifying an Acceptable Rockfall Standard

by Scott A. Anderson, P.E., Ph.D., (M.ASCE), Principal Geotechnical Engineer; BGC Engineering, Inc., Golden, CO, scanderson@bgcengineering.ca,
Marilyn D. Dodson, P.E., (M.ASCE), Senior Geotechnical Engineer; Central Federal Lands Highway Division, Federal Highway Administration, Lakewood, CO, marilyn.dodson@dot.gov,
Ty Ortiz, Geohazards Program Manager; Colorado Department of Transportation, Denver, CO, ty.ortiz@state.co.us,


Serial Information: Issue 5, Pg. 34-39


Document Type: Feature article

Abstract: For many parts of the U.S. highway system, cut slopes in rock are as common as bridges and embankments. These cut slopes, as well as some natural ones, produce rockfalls that pose risks to highway conditions and our ability to move people and goods efficiently and safely. Highway departments have long recognized that completely eliminating this risk was impossible, so they have focused on minimizing it. Over the years, many risk management approaches have been implemented, and by the early 1990s, rockfall hazard rating systems (RHRS) were being used to manage the risk from existing slopes.

Subject Headings: Risk management | Landslides | Slopes | Highway bridges | Rocks | Embankment (transportation) | Highway and road conditions | Freight transportation

 

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