RedactedNarrative: I received a call about a boating incident on tippecanoe lake. I learned the boat operator left  the scene and was inside a nearby residence. I arrived on scene approximately 45 minutes after the initial call. I interviewed operator and he told me he was sitting on the gunwale and driving the boat into a channel connecting tippecanoe lake to oswego lake when he struck a docked pontoon boat. Operator said he could not see well due to it being dark. Upon colliding with the pontoon boat operator was ejected into the water. Operator said he climbed back into the deck boat and left the scene because the juvenile occupants in the boat were scared. There were no injuries observed or reported. The evidence at the scene shows operator was unsafely operating the deck boat at a high rate of speed, exceeding the night speed limit of 10mph when he struck an occupied, docked pontoon boat. The impact caused extensive damage to the stern, port side, and mechanical units of the pontoon boat and the per it was docked at. Alcohol is believed to be a contributing factor.