Update, 7:40 p.m.: The wreck has cleared and all lanes are re-opened, per WSDOT, though it might take some time for traffic to clear out.
Update, 7:15 p.m.: WSDOT reports on X that tow trucks are enroute to remove damaged vehicles. Only the right lane remains blocked.
Original post: A multi-vehicle crash involving at least one tractor-trailer was blocking westbound State Route 512 near Canyon Road on Monday evening…