A Vault-tec long term “fail safe” control vault. Built into a former limestone mine Vault 38 is the largest vault constructed. It was designed to hold an initial population of 2,000 with a projected expansion of up to 10,000 over the estimated 300 year lifetime of the vault. As of 2288 the vault population sits at 6,000. The vault’s overseer is responsible for maintaining the health, morale, and stable population growth of the vault’s residence, aided in this task by Glenda, the ZAX Mainframe based AI networked into every vault system and robot.
Vault-tec designed Vault 38 to be a seed colony to repopulate the earth in the event that the worst projections for the future came to pass.