From the Washington State Department of Transportation:
I-90 remains closed in both directions Wednesday between mileposts 84 near Cle Elum and 106 near Ellensburg due to a collision involving a truck carrying ammonia.
This is going to be an extended closure possibly lasting until 5 p.m. or longer.
Alternate routes are available via SR 10, SR 970 or US 97. Due to the amount of traffic being detoured to these routes, drivers should expect delays.
Find updates on WSDOT's webiste at www.wsdot.com/traffic/trafficalerts/.