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A landslide on NW Thompson Road led to a lane closure there on Sunday that will impact the Monday morning commute. Photo by Portland Bureau of Transportation.
(Sunday Feb. 23, 2025) The Portland Bureau of Transportation advises the traveling public that NW Cornell Road will be closed to all traffic all day on Monday and one lane on NW Thompson will also be closed for the same timeframe.
Both will have impacts on the Monday morning commute in the area.
We ask the public to avoid these areas, and expect delays if traveling nearby.
- NW Cornell Road is closed to all travelers, between NW Skyline and NW Thompson Road. Local access for residents in the closure area will be allowed.
- The westbound travel lane on NW Thompson is closed from NW Pinnacle Drive to NW Miller Road. This slide is at 8450 NW Thompson, the road just west of the intersection of NW Thompson Road and NW Skyline Blvd.
The duration of the closures may change. The timeframe for the closures depends on the results of inspections and the work of road crews clearing debris on Monday.
Heavy rain over the weekend contributed to these incidents -- the first landslides to require closures on major thoroughfares this winter.
PBOT is the city's lead for response to flooding and landslides that impact city streets. Earlier this winter, crews cleared several smaller slides that had smaller impacts on less traveled streets.
 This landslide on has to the closure of NW Cornell Road through the Monday morning commute. Slides often undermine the stability of a hillside, requiring engineers to insect during daylight hours to ensure the safety of road crews and the traveling public. Photo by PBOT.
Landslides often undermine the stability of a hillside, causing additional slides to occur that could bring trees, rocks and other material down in the same area.
PBOT engineers will inspect the slides Monday morning, during daylight hours to have a full view of the area. Their inspections are needed to ensure the area is safe for PBOT maintenance crews to work on.
Maintenance crews did an initial inspection and closed Cornell and the lane on Thompson on Sunday evening, shortly after the incidents were reported.
If it is deemed safe, crews plan to return on Monday to remove debris.
Please avoid these areas if possible and expect delays.
We ask the public to travel cautiously, observe all road closure sign directions by reader boards and flaggers, and use alternate routes.
This work is weather dependent and the timeframe of the closures may change.
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The Portland Bureau of Transportation (PBOT) is the steward of the City’s transportation system, and a community partner in shaping a livable city. We plan, build, manage and maintain an effective and safe transportation system that provides access and mobility. www.portlandoregon.gov/transportation
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