The Springfield Hydroelectric Dam is the only hydroelectric dam in Springfield. The project to build the dam was managed by Cecil and Sideshow Bob. It was later discovered by Sideshow Bob, Bart and Lisa that the dam didn't have any cement inside, and the money for it was stolen by Cecil. He attempted to destroy the Dam with a bomb, in order to wipe out Springfield as a plot to frame Sideshow Bob as revenge for being made Krusty's Sideshow over himself. Sideshow Bob, Bart and Lisa were able to foil Cecil's plans. The Dam was hollow and so exploded by itself, but the water just rushed through Springfield, not causing any damage[1]. To pay for the Dam's reconstruction, the town sold the billboard rights to the structure to Duff Beer, much to Homer's joy.[2]