The 21st Mission Support Group ensures there is a 99.999% degree of reliability of its electricity, water, air conditioning, power, and other support systems. The complex has its own power plant, heating and cooling system, and water supply. The recreational amenities include Mountain Man Park, picnic areas, a racquetball facility, softball field, sand volleyball court, basketball court, a putting green, and horseshoe area. Outside of the military complex are the parking lots, a fire station, and outdoor recreational facilities. The south opening has a concrete abutment. The exterior North Portal protects the eastward tunnel opening. Amenities include a medical facility, store, cafeteria, and fitness centers inside and outside the mountain. There are a large quantity of cots for most of the personnel, including suites for high-ranking officers within the bunker. The complex is the only high-altitude Department of Defense facility certified to be able to sustain an electromagnetic pulse (EMP). A total of more than 1,000 springs are designed to prevent any of the 15 buildings from shifting more than 1 inch (25 mm). earthquake or explosion, by a system of giant springs that the buildings sit on and flexible pipe connectors to limit the operational effect of movement. Fifteen three-story buildings are protected from movement, e.g. The complex was built under 2,000 feet (610 m) of granite on 2 hectares (5 acres). main chambers (gray grid) for the centers (dark green buildings are 3 story) with 3 tunnels 45 feet (15 m) wide, 60.5 feet (20 m) high, and 588 feet (180 m) long intersected by 4 cross tunnels 32 feet (10 m) wide, 56 feet (17 m) high and 335 feet (100 m) long.a support area including reservoirs (blue), and.

side tunnels to the main chambers and the support area,.Access Tunnel (right) with North and South openings at the mountain's east slope,.Diagram of tunnels to buildings within the mountain:

Rocky mountain blueprint