OAR 629-623-0250: Shallow, Rapidly Moving Landslide Impact Rating

(1) The State Forester will publish technical guidance for evaluating and rating shallow, rapidly moving landslide impact potential for any exposed population. Impact rating factors may include, but are not limited to: the location of the structure or road in relationship to the debris torrent-prone stream or steep slope; channel confinement; channel gradient; channel junction angles; and debris in the channel. (2) Shallow, rapidly moving landslide impact potential is rated as unlikely, moderate, serious and in limited cases, extreme. (3) The State Forester may require the landowner to submit a geotechnical determination of shallow, rapidly moving landslide impact rating for the proposed operation. (4) The impact rating may include the potential for the failure of a structure in the direct path of a rapidly moving landslide resulting in a substantial risk of serious bodily injury or death to the exposed population below that structure. (5) The State Forester will make the final impact rating.