Vail-Eagle County, CO (EGE) They have no tower, and no radar. In the summer, its a rather sleepy GA airport. During the winter months, it is hopping. Upwards of 10-15 757's, plus so 146's will fly in there on peak days from the majors, not to mention all of the GA traffic. Being in a mountain valley, with no tower, and no radar, only one aircraft at a time on approach or departure is allowed below radar from the Denver control center. Aircraft fall below radar around 14,000-15,000 ft, and the airport sits around 6,000 ft. So, when an aircraft takes off, another aircraft isn't allowed to takeoff or descend below radar until the previous aircraft has radar contact. Usually, the airline traffic gets priority, but there can be quite a back-up of GA traffic. The departure interval of aircraft is anywhere between 5-10 minutes each.