Utah Campground Closed Because of Plague Tue May 16, 8:52 AM ET A campground at Natural Bridges National Monument has been closed because of bubonic plague detected among field mice and chipmunks. Plague also has been found this spring in rodent populations at Mesa Verde National Park and Colorado National Monument. National Park Service officials said there never has been a reported human case of bubonic plague originating from the parks or national monuments. "We come down on the conservative side when it comes to closing campgrounds," said Joe Winkelmaier of the U.S. Public Health Service. "We just like to...