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Unstable Slopes Program
Aerial View of Slide
Cape Cove Slide - Aerial View
The purpose of the Unstable Slopes Program is to inventory and rate all landslides, rockfalls, and other types of unstable slopes affecting the State’s highway infrastructure. In the past, all rock slopes along ODOT roads were inventoried and rated using the Rockfall Hazard Rating System. All rock slopes still have a RHRS rating, but it has been decided to move toward the Unstable Slopes Program so that all unstable slope types can be inventoried in one system.
This system also allows for economic factors to be measured along with hazards and engineering considerations, so that a sensible repair priority can be more easily obtained. The records for the Unstable Slopes Program are kept in an Access™ database, and a shapefile containing the same information is updated on a regular basis.
The Unstable Slopes Program is still in its infancy, so there is no data available to be viewed at this time, but if you have questions please feel free to contact us.


Engineering Geology Program Lead

 Program Resources
Other Resources
Guidance and Resources