The San Diego County Water Authority announced Monday that it will take a long-running legal dispute over rates to the state Supreme Court. The decision comes just over a month after an appellate court issued what amounted to a split decision in the Water Authority’s case against the Metropolitan Water District of Southern California. The SDCWA has sued the MWD multiple times over rates, with the largest issue being how much the MWD was allowed to charge for transporting Colorado River water to San Diego.