The Seattle Times reports there is no other detour around the crash, on account of it being covered in snow.
Two people were killed early Friday morning near Snoqualmie Pass on westbound Interstate 90 in a crash involving as many as 10 vehicles, at least two of them semi-trucks.
"I don't think it's going to be closed through tomorrow, we're really hoping to have it back open before tonight, but again it will really depend on their investigation", Meagan Lott of WSDOT explained. The westbound lanes were closed for much of the day.
The patrol and the state Department of Transportation work to clear blocking collisions as quickly as possible because interstate closures affect thousands of motorists and business-related traffic.
Investigators believe that the arrested truck driver lost control and veered across all traffic lanes before crashing.
Two people were pronounced dead at the scene and 5 others were transported to Overlake Hospital with non-life threatening injuries. It later closed at milepost 106 near Ellensburg.
The collision is being investigated as one collision and not two separate collisions as previously reported.
The names of those involved in the crash have not been released.