Washington Mudslide Forces Partial Closure on I-90 Near North Bend After Overnight Hillside Collapse
WASHINGTON — An overnight mudslide caused a major section of hillside to collapse along Interstate 90 near North Bend, forcing early-morning eastbound closures and prompting safety evaluations as crews continue monitoring unstable terrain.
Overnight Hillside Failure Sends Debris Toward I-90
According to the Washington State Department of Transportation (WSDOT), the slide occurred when a saturated hillside gave way near milepost 34, sending loose soil and debris toward the roadway.
A large portion of the ground bordering the interstate is now missing, leaving a sharp drop-off where the shoulder once was.
Photo evidence from the scene shows significant slope erosion, indicating conditions may worsen if additional soil movement occurs.
WSDOT: I-90 Reopened but Risk Remains
WSDOT officials confirmed that I-90 eastbound has reopened after temporary closures earlier this morning.
However, crews remain on site to:
- Assess the stability of the hillside
- Monitor for additional slippage
- Determine whether future closures may be necessary
Officials emphasized that road conditions could change quickly, urging drivers to use caution and watch for active work zones.
Heavy Rainfall Likely Contributed to the Slide
The region has recently experienced prolonged rainfall and saturated ground conditions, a combination known to significantly increase mudslide risk across Western Washington.
Early evaluations suggest the collapse was weather-driven soil instability, though geotechnical teams continue to investigate.
Drivers Should Expect Delays and Changing Conditions
Motorists traveling through the I-90 mountain corridor should plan for:
- Slowdowns near North Bend
- Possible additional closures
- Crews working alongside the roadway
WSDOT will provide updated information throughout the day as inspections continue.
NapervilleLocal.com will keep residents informed with real-time updates as transportation officials release new details.
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