Recent interest and awareness of the Cascadia Subduction Zone and the potential for large earthquakes in Oregon has produced a wealth of information that identified potential hazards.
Lane County Building Safety has begun to review residential structural permits to more closely evaluate these hazards.
A geotechnical or soils report (OSSC Section 1803.6) from a qualified licensed professional in Oregon will be required if:
- The site for the proposed structure does not meet ascending and descending setback requirements
- The site is identified within a liquefaction or landslide hazard area
- The site for the proposed structure will be located on a slope 20% (2:10 or 11.3 degrees) or greater prior to excavation
- Is required by the Planning Program to have a special foundation system.
Further information can be found in this notice:
Geo-Technical Hazards Notice Handout
To determine if a parcel is within the hazard area:
Geotech Report Requirement Area