A federal appeals court has turned down Tampa Bay Water's latest effort to blame problems at its 15.5 billion gallon reservoir on HDR, the company that built it. Three judges with the 11th U.S. Circuit Court of Appeals in Atlanta issued a 33-page ruling Monday rejecting the utility's arguments that the trial judge had committed a series of errors that should be overturned. Last year a jury in Tampa listened to evidence for a month, but took just four hours to decide the Nebraska-based HDR was not responsible for fixing the cracks that have plagued the structure, which is the largest reservoir in Florida. As a result, the cost of the multi-million-dollar repair work will likely fall on the shoulders of the 2 million ratepayers in Pinellas, Pasco and Hillsborough counties.