(Castle Rock, WA) -- A dozen people are doing OK after becoming trapped by a mudslide in Cowlitz County over the weekend. Officials say the 12 people were rescued by helicopter after they were trapped by a large mudslide across SR 504 near Mt. St. Helens. The slide happened Sunday evening near Coldwater Lake. Washington's King County Sheriff's Office helicopter flew the trapped people, and one dog, out of the area. The mud and debris covers the entire highway. WSDOT doesn't know when the highway will reopen.