[2] The primary responsibility of Denver Center is sequencing and separation of over-flights, arrivals, and departures to provide safe, orderly, and expeditious flow of aircraft filed under instrument flight rules (IFR).
Denver Center is the 13th busiest ARTCC in the United States.
[3] Denver Center covers approximately 285,000 square miles of the Western United States, including all or parts of Colorado, Arizona, New Mexico, Utah, Kansas, Nebraska, South Dakota, Wyoming, and Montana.
[4] Denver Center is adjacent to five other Air Route Traffic Control Centers: Minneapolis Air Route Traffic Control Center, Kansas City Air Route Traffic Control Center, Albuquerque Air Route Traffic Control Center, Los Angeles Air Route Traffic Control Center, and Salt Lake City Air Route Traffic Control Center.
The Denver Center overlies or abuts several approach control facilities (including Denver, Aspen, Colorado Springs, Pueblo, Grand Junction, Casper, Cheyenne, and Ellsworth AFB in Rapid City).