Jim Madaffer says he’s the new sheriff in town at the San Diego County Water Authority. For anyone who doesn’t follow the intricacies or intrigues of what seems like it should be an agency with a straightforward mission – providing water for San Diego – this may sound like a bit of pabulum. But Madaffer, the colorful former San Diego city councilman who has had numerous other roles on obscure but important agencies, is serious. His first task after he became chairman of the Water Authority board was to clean house.