The Boulder City ruins is a location in the center of Boulder City, between the 188 Trading Post and Hoover Dam in 2281. The ruins are blocked off from the rest of the city by rubble and a NCR barricade. Lieutenant Monroe stands in front of the barricade.
The ruins consist of several destroyed buildings. The entrance is controlled by Lieutenant Monroe. During the quest They Went That-a-Way and Boulder City Showdown, the Great Khans have taken two NCR troopers hostage in a building on the west side. Jessup and another Great Khan are using a small shop as a holdout against the NCR, who have them pinned down.
- Jessup's bandana - Worn by Jessup in the Great Khan hideout.
- Engraved cigarette lighter - In Jessup's inventory; he must be killed, pickpocketed or it can be given to the Courier by Jessup if the situation between the NCR and Great Khans is resolved peacefully.
The Boulder City ruins appear only in Fallout: New Vegas.