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There is a flooded quarry surrounded on all sides by straight-up rock walls. The breaks in the wall are a ramp on the western side and an embankment on the north and southeast corners. At the end of the ramp are some portable toilets and some explosives. One of the toilets contains a cat bowl and a Mr. Fuzzy yellow hard hat. A mirelurk queen lurks beneath the surface of the water and will attack if disturbed.
- Power armor chassis with T-series armor pieces - At the edge of the road next to the modular building.
- Random Vault-Tec bobblehead - Inside the trailer, in the middle of a desk.
- Mr. Fuzzy yellow hard hat - Inside a portable bathroom on the left.
- Random weapon mod - On top of a cabinet inside the metal shack.
Quarry X3 appears only in Fallout 76.