The iconic cooling tower, visible from Interstate 5 in Washington and U.S. Route 30 in Oregon, was demolished in 2006 via dynamite implosion at 7:00 a.m. PDT on Sunday, This event marked the first implosion of a cooling tower at a nuclear plant in the United States. Additional demolition work on the remaining structures continued through 2008. The central office building and the reactor building were demolished by Northwest Demolition and Dismantling in 2008. Remaining are five buildings: two warehouses, a small building on the river side, a guard shack, and offices outside the secured facility. It is expected that demolition of the plant will cost approximately $230 million, which includes the termination of the plant possession-only license, conventional demolition of the building and continuing cost for storage of used nuclear fuel.