Quite simply, my idea is that you will be able to go to the power/water plants and perform maintainance on them. This will allow players in multiplayer to have an actual job (Keeping it running for all other players). HOWEVER, the maintainance will be very hard to do, requiring strength and time. This will also ensure that it will take a small team to effectively keep the plants running. I would also suggest professions from each plant, with each slightly increasing their effectivness at repairing the plants. Sorry in advance for horribly written post. :-/
