RICHLAND, Wash. (AP) — A driver in a Richland boat race died Friday after his hydroplane boat flipped during the event. The Benton County Sheriff’s Office told KNDU television that the driver was Matt Mattson of Poulsbo. He was tossed into the Columbia River when his boat flipped during the Richland Regatta. The three-day event is organized by the Northwest Powerboat Association and held in Richland. Mattson drove “Good Vibrations,” an SE-400 boat. The boat was reportedly traveling about 90 mph when Mattson was thrown from the open cockpit. He was taken to a hospital, where he was pronounced dead.