Arlington Utility

 is part of the Metro system under the Capital Wasteland, but the metro part of the tunnel has collapsed. It is an underground utility tunnel and caves infested with Raiders and a few Mirelurks. It connects Arlington Cemetery North and the DCTA Tunnel 014-B Potomac tunnel system.

Notable Loot

 * U.S. Army: 30 Handy Flamethrower Recipes is found on the second floor in the "kitchen area". Coming from DCTA Tunnel 014-B Potomac, it's past the caves, when you enter the tunnels again full of raiders. The first stairs on the right, on a shelf.