| ||For the similarly named tunnels that lead to the White House, see Utility.|
A door located under a trap door to the northeast of the Fairfax ruins, one level higher, travel point leads to room with several ammo boxes and a mine box. An electrical switch opens a hatch on the floor, behind which several raiders lurk. A manhole to the north, one level higher than the trap door, and another manhole further to the west of that, on the edge of Fairfax ruins, also allow access and egress. This room leads to the trap door entrance. A few aid boxes and a total of 3 mines can be found in the actual tunnels.
- "Fort Independence field report #2" mentions "a small weapons cache in the southeast section of the tunnels".
The utility tunnels appear only in Fallout 3.