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Unstable Slopes

Landslide covers entire left lane of a two-lane road. The right hand lane is left badly damaged.  

The Unstable Slopes Program analyzes slopes adjacent to state highways for potential impacts that a failure could cause. Such failures include:

  • Landslides;
  • Rock falls; and
  • Debris fills.

Historically, ODOT has evaluated rock fall hazards, but has expanded the program to include other types of unstable slopes. Under the revised program, ODOT is able to include economic factors in its analysis as well as hazard and engineering considerations so that sensible repair priorities can be more easily obtained.

As the Unstable Slopes Program is in its infancy, no data is available for publication, but if you have questions, please contact us.

USGS Landslide Hazards Program

Oregon Department of Geology and Mineral Industries, Landslide Hazards in Oregon

Guidance Materials

​Additional support for specific geo-hydro and environmental needs in the form of:

  • Standard drawings and details,
  • Drafting manuals,
  • CAD standards,
  • ODOT workspace, and
  • Example drawings and templates.

Contact the Geo-Environmental Section's Drafting Program for information.

Contact the Geo-Environmental Section

4040 Fairview Industrial Drive SE, MS 6
Salem, Oregon 97302
Phone: 503-986-3252
Fax: 503-986-3249

Program Lead

Phone: 503-986-3490