Federal Surveillance Center K-21B

The Federal surveillance center K-21B, located underneath an abandoned shack, is a location in the Commonwealth in Fallout 4.

Layout
On the outside, the abandoned shack has some highly irradiated water and nuclear waste barrels. The inside of the shack contains a locked door to the cellar with the skeleton of a prewar government employee named Bill. It is implied that he died just before reaching the cellar from the fact that the documents giving him access to the facility state not to bring any baggage, yet he still had a large bag with him. The cellar leads to a large underground bunker, here is a large open shaft passing through the middle of the bunker. Up to three synths inhabit the bunker.

On the bottom floor of the bunker is a hackable terminal, here you can reactivate the emergency power and elevators and take an elevator back to the surface, Once you arrive at the surface the abandoned shack marker gets replaced by the Federal surveillance center K-21B one.

The center served as an outpost for government surveillance workers who were meant to continue their work well after the bombs fell. Not many workers made it to the bunker and a holotape can be found on an employee's desk detailing the fall of the bunker.

Notable loot

 * Power armor frame With randomized pieces that are level bound.
 * Lunchbox one behind the power armor frame in a small maintenance cart, and one on top of the main control center near the novice locked terminal.
 * Covert Operations Manual Next to a terminal (novice) on the lowest floor.
 * Mini nuke under the stairs on the lowest floor.
 * Stealth Boy in the southern corner room one floor down as you enter the surveillance center.

Appearances
The abandoned shack appears only in Fallout 4.