Editing Cheyenne Mountain Complex (section)

=== Support area ===
The complex has its own power plant, heating and cooling system, and water supply.{{r|721 CES}} The [[21st Space Wing|21st Mission Support Group]]<ref>{{Cite web|url=http://www.peterson.af.mil/News/Article/1806992/721st-msg-inactivates-realigns-with-21st-msg/|title=721st MSG inactivates, realigns with 21st MSG|website=Peterson Air Force Base}}{{dead link|date=March 2025|bot=medic}}{{cbignore|bot=medic}}</ref> ensures there is a 99.999% degree of reliability of its electricity, water, air conditioning, power, and other support systems.{{r|Terdiman}} The threats, in descending order of likelihood, that the complex may face are "medical emergencies, natural disasters, civil disorder, a conventional attack, an electromagnetic pulse attack, a cyber or information attack, chemical or biological or radiological attack, an improvised nuclear attack, a limited nuclear attack, [and] a general nuclear attack." The least likely events are the most hazardous.{{r|Terdiman}}

There is more water produced by mountain springs than the base requires, and a 1,500,000-gallon (5,700,000-litre) reservoir ensures that even in event of fire, there is enough water to meet the facility's needs. A reservoir of 4,500,000 gallons (17,000,000 litres) of water is used as a heat sink.{{r|Terdiman}} There is a "massive" reservoir for diesel fuel and a "huge" battery bank with redundant power generators.{{r|Terdiman}}