Certain factions in Hoover Dam would rather see Jericho fail and turn to dust rather than prosper as an independent entity in the wasteland. These elements will ask the PC to sabotage the water plant and render it incapable of producing fresh water ever again.
Character type completion breakdown
Stealth Boy - Can walk up to the boilers, pumps, and pipes and remove or loosen parts without being noticed and without causing the equipment to fail immediately (Steal/Hard).
I subtlety sabotaged much of the Jericho plant's equipment. It won't fail immediately, but soon... and when I'm not around to be blamed.
I make water plant machines not work good. Soon all be broke.