OGDEN, Utah (AP) — Authorities have identified a teenager killed by an avalanche while snowmobiling in Utah. The Davis County Sheriff’s Office says 18-year-old Chase Adams was killed Saturday afternoon while snowmobiling with his father in Farmington Canyon north of Salt Lake City. It took search and rescue crews about half an hour to find and dig out the teen, who died at a hospital in Salt Lake City. The teen had an avalanche beacon and an inflatable backpack that’s meant to help avoid being buried, but the backpack did not deploy.