Known Vaults

The Vaults were never intended to save the population of the United States. With a population of almost 400 million by 2077, the U.S. would need nearly 400,000 Vaults the size of Vault 13, and Vault-Tec was commissioned to build only 122 such Vaults. The real reason for these Vaults was to study preselected segments of the population to see how they react to the stresses of isolationism and how successfully they re-colonize after the Vault opens. Rumor has it there were 122 different vault experiments. Some of the experiments include:

Vault Location Experiment
LA Southern California, Near Los Angeles (Cathedral) The Vault-Tec, demonstration vault. It was not part of the experiment, and was the Master's vault under the Cathedral.
0 Cheyenne Mountain (Colorado) A special vault designed to "monitor and control" other vaults, maintain the geniuses of the pre-War United States in cryogenic stasis and improve the future Wasteland conditions with a robot army.
3 Mojave Wasteland A control vault designed to open after 20 years, but kept closed longer due to the wishes of the vault inhabitants. However, an unplanned water leak forced the occupants to open in hopes of trading with the outside. Unfortunately, all of the vault's residents were massacred by a group of raiders known as the Fiends shortly after they opened the vault door.
6 Mount St. Helens, Washington The vault's original purpose in the Vault Experiment was that it allowed small doses of radiation to leak into the vault once per day, it resulted in the population turning into an aggressive pack of extremely irradiated feral ghouls.
7 Seattle This vault's only drinkable liquid provided was Nuka-Cola.
8 Northern Nevada (Vault City) A control Vault, intended to open and re-colonize the surface after 10 years. Vault City is the result. Unfortunately.
11 Mojave Wasteland This vault was a social experiment testing human nature — most specifically the ability to sacrifice oneself for others, and the ability to place ideals above one's own life.
12 Bakersfield (Necropolis) In order to study the effects of radiation on the selected population, the Vault Door was designed not to close. This is the Necropolis Vault… and the ghouls were the result. The Overseer's room was sealed due to the fact that the main door of the Vault was doomed never to close.
13 Southern California Intended to stay closed for 200 years as a study of prolonged isolation, the broken water chip forced the Overseer to improvise and use the Vault Dweller as a pawn. Later study of the Vault 13 records by the Enclave led them to their plan to end the war.
15 Southern California Intended to stay closed for 50 years and include people of radically diverse ideologies.
17 Unknown The vault was raided in 2154 and its inhabitants taken prisoner by the Master's Army. They were subsequently turned into super mutants.
19 Mojave Wasteland The vault was segregated into two groups, 'Red' and 'Blue'. The groups lived in separate sections of the vault and the inhabitants may have been chosen due to pre-existing paranoia. It was unique in that it had two overseers: one for the Red Sector, one for the Blue Sector.
21 Las Vegas, Mojave Wasteland This vault's purpose was gambling, reinforced by having only compulsive gamblers admitted as vault residents, and with all conflicts within the vault within the vault to be resolved through gambling. It is one of the few non-control vaults that didn't end in failure.
22 Mojave Wasteland Apparently a vault designed to develop advanced agricultural technologies. Successful experiments were executed, creating strains of plants that could grow under artificial light. However, an experiment on pest control involving a genetically-manufactured spore annihilated or transformed the vault's inhabitants.
24 Mojave Wasteland Unknown.
26 Seattle Only 200 people was assigned to this vault, only 10% of the maximum capacity.
27 Unknown This Vault would be overcrowded deliberately. 2,000 people would be assigned to enter, double the total sustainable amount.
29 Colorado No one in this Vault was over the age of 15 when they entered. Parents were redirected to other Vaults on purpose. This Vault was outfitted with a ZAX AI, which replaced the Overseer.
34 Mojave Wasteland The armory was overstocked with weapons and ammo and not provided with a lock. The Boomers, the weapon-crazy inhabitants of Nellis Air Force Base, descended from the inhabitants of this vault.
36 Unknown The food extruders were designed to produce only a thin, watery gruel.
39 Abilene, Texas Unknown.
42 Unknown No light bulbs of more than 40 watts were provided.
43 Unknown Populated by twenty men, ten women, and one panther.
50 Seattle This vault was intended to never open, but the residents of the vault overthrew the overseer after discovering the purpose of the vault and opened the door two weeks ago on, <2 weeks before game opening>. Residents of this vault are just now starting to emerge from the vault.
53 Unknown Most of the equipment was designed to break down every few months. While repairable, the breakdowns were intended to stress the inhabitants unduly.
55 Unknown All entertainment tapes were removed.
56 Unknown All entertainment tapes were removed except those of one particularly bad comic actor. Sociologists predicted failure before Vault 55.
65 Seattle Music was pumped through the vault's speakers twenty-four hours a day with no way to turn it off.
68 Unknown Of the one thousand people who entered, there was only one woman.
69 Unknown Of the one thousand people who entered, there was only one man.
70 Salt Lake City, Utah All jumpsuit extruders fail after 6 months. Most of the inhabitants were Mormons. The city of New Cannon was founded by the vault dwellers after they left the vault.
74 Capital Wasteland Unknown.
75 Malden, The Commonwealth Excluding vault staff, all residents were under the age of 18 at the time of vault activation; parents were quietly separated from their children and later executed by vault security. The experiment went well for several generations, but the archives were destroyed and most if not all of the progress made was lost.
76 Capital Wasteland This vault was designed as a control group for the vault experiment. Like Vault 3 and Vault 8, it was intended to open and re-colonize the surface after 20 years. Vault 76 was unveiled by Vault-Tec in 2076 in celebration of the United States' tercentenary.
77 Unknown Populated by one man and a crate full of puppets.
81 Boston, The Commonwealth Intended to develop a single cure for all human diseases through testing on unaware human subjects. The vault had two sections: the residents lived in one section, while Vault-Tec scientists secretly observed them and worked in the other. Unexpectedly, the original overseer disabled the equipment the scientists were to use to expose the residents to diseases. As of 2287, the vault's residents are alive and well, and regularly trade with the outside world.
82 Seattle Gas, which induces nightmares, was pumped into the vault fourteen days after the door was sealed.
87 Capital Wasteland A Forced Evolutionary Virus research and testing facility.
88 Boston, The Commonwealth Intended to test various prototype devices with the aim of rolling them out to the rest of the vaults; this vault was never fully constructed; only the entrance and a few interior rooms were finished before the Great War began.
92 Capital Wasteland Populated largely by renowned musicians, this vault was a test bed for a white noise-based system for implanting combat-oriented posthypnotic suggestions.
95 The Commonwealth Populated solely with drug addicts, with the exception of a single Vault-Tec employee undercover. The vault residents would elect an overseer regularly and hold therapy sessions as part of a rehab program. Five years after the vault was sealed, a hidden stash of drugs was unlocked. Within a few days, all of the vault residents but one fell back into addiction or killed each other.
100 Capital Wasteland Unknown.
101 Capital Wasteland Evaluation of performance of an omnipotent, dictatorial overseer in a closed community. This vault was intended to never open.
106 Capital Wasteland Psychoactive drugs were released into the air filtration system 10 days after the Door was sealed.
108 Capital Wasteland The vault houses a cloning lab and all (surviving) residents are clones of one man called Gary.
111 Sanctuary Hills, The Commonwealth Tested the long-term effects of cryogenic suspension on unaware individuals. The vault's staff were assigned to observe the residents and protect the vault for 180 days. Dwindling supplies drove the security personnel to mutiny against the scientists and leave. Over a century after activation, a mercenary broke into the vault in order to kidnap an infant resident. In the process, he killed all but one of the vault's frozen residents.
112 Capital Wasteland Home of the Tranquility Lane virtual reality simulator.
113 Seattle The vault's lighting system was designed to fail after six months. No replacement light bulbs were provided.
114 Boston, The Commonwealth Intended to test the stress of living in impoverished, disenfranchised conditions by those previously accustomed to extreme wealth and power. Residents were to be exclusively politicians and Boston's wealthy elite, with the exception of the overseer. Construction was never completed.
117 Seattle This vault was designed as a control group for the vault experiment. Like Vault 8 and 76, it was intended to open and re-colonize the surface after 20 years.
118 Mount Desert Island, Maine The vault was intended to encompass two wings under one overseer, each one to house exclusively members of the highest class of society (Hollywood actors, business tycoons, scientists, artists, etc.) or the lower classes. The second wing was never finished and while the vault was used as a fallout shelter, the vault experiment never started.
120 Seattle No one under the age of 30 was assigned to this vault. Anyone younger was assigned to another vault.
122 Seattle This vault was closed with just the overseer inside. The vault door still remains closed to this day with no visible way to reopen it.
Unfinished Northern California A fenced construction area in a small cave north of Vaults 13 and 15. It may have been the first location of Vault 13 before its relocation.
Secret Los Ybanez, Texas A secret vault dedicated to protect high-members of Vault-Tec and used to research the latest technologies (like electrical laser weapons and instant regeneration) and the Forced Evolutionary Virus.
Prototype Texas A small Vault-Tec facility used as the base of operations by the Brotherhood of Steel
Burkittsville Burkittsville, Maryland An unnamed vault near Burkittsville mentioned in the Hamilton's Hideaway terminal entries. Outside of the vault, cannibals wait to ambush those seeking refuge in the vault.
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