Vault 101

Vault 101 is a vault that Crywren Caster lived in developed by Vault-Tec in the north-west area of Washington, D.C., near Tysons Corner. This vault is located northwest of Megaton, and west of Springvale.

Construction and purpose
It is not exactly known when the construction of Vault 101 began, but it was constructed sometime in the 2060s just as the other vaults in Washington, D.C.

Vault 101 had been opened more than once, violating its original purpose, and became infested by radroaches during these events, making the vault susceptible to additional large infestations as time went by. One of the main and only objectives of Vault 101 security, has been the containing and killing of these radroaches.

The original and underlying purpose of the Vault 101 vault experiment, was to stay closed indefinitely, as: a study of the human condition, the genetic impact of a small group of individuals breeding throughout several generations, and the role of the Overseer when a vault never opened. The limited genetic material would eventually result in inbreeding. Vault 101 was supplied with most of the equipment it would need to function indefinitely, such as seen with spare parts for the water processor, but the vault did not receive a G.E.C.K.; a piece of technology that would have only been able to be used on the surface.