A 50-year-old Utah man was killed in a rafting accident on the Green River in Dinosaur National Monument in Colorado, National Park Service officials said Friday. Federal officials learned that a raft was pinned on a rock in the Hell’s Half Mile rapid around 4 p.m. Thursday and that one person was missing and likely pinned under the raft, according to a news release. Related Articles Crime and Public Safety | Colorado’s 10 best dinosaur destinations, from museums to track sites and quarries The group, part of a private permitted trip, were later able to unpin and recover the boat.