The recent NCRCF prison break and the formation of the Powder Gangers deprived the Sloan miners of their dynamite supply, taken over by the raiders. Coupled with a recent breakage in the dragline, they were forced to suspend all limestone mining operations until further notice. But even if they could restart mining, the deathclaws that moved into Quarry Junction make any work impossible.
Chomps Lewis will give the player the rundown of the situation at the Quarry and explain that as long as the lizards remain in, the miners have to stay out. When pressed, he will explain that killing the alpha and the den mother will likely disperse the pack. If the player mentions taking the deathclaws on and is at least level ?, then Chomps will give them five stimpaks and five super stimpaks as advance payment.
Both of the deathclaws are located deep inside the Quarry and taking them out will likely require going through the rest of the pack. If they are both killed, the pack will leave the Quarry within three days. Chomps will be elated and give the player a cash reward, a boost to NCR fame, and quarry workers will resume shipping to Boulder City, appearing at the Big Horn Saloon and delivering news to Ike the bartender there.
Lewis is prone to dying or disappearing through level geometry. The console command player.placeatme 000e5958 will place him at the player in the latter case.