RedactedNarrative: Vessel was towing a tube on Milford Reservoir near West Rolling Hills Park. Three subjects were on board the vessel and three subjects were on board the tube. Two male subjects and one female were on board the tube, with the female subject being in the middle. All three subjects were facing forward riding in a kneeling position. Vessel was traveling south at approximately fifteen to twenty miles per hour. Vessel made a left hand turn which swung the tube outside the wake on the starboard side of the vessel. While sliding sideways across the water, the tube rolled and tossed all three subjects into the water. The female subject suffered a broken left arm when she impacted the water. The female subject was transported to Geary Community Hospital for treatment. No other injuries were reported as a result of this incident.