Initial radioed reports from the scene spoke of a vehicle on its side in the left lane.
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Minutes after reports of concrete in the lanes were received, report of a crash was also received.
A motorcyclist was pronounced dead at the scene.
The other driver sustained severe injuries that required being flown to Harborview Medical Center in Seattle.
The closures will allow contractors to grind down and repave the ramps.
A NVHS 10th grader died from his injuries.
1 of the drivers fled the crash on foot.
People traveling in the area should expect delays and consider taking alternate routes.
The crash resulted in closing the right lane for about 15 hours.