RedactedNarrative: On 07/04/18 at approximately 1615 we assisted the USCG at 3rd st docks on Coeur D'Alene Lake. Operator had driven his boat into the gas dock while his 20 year old daughter was bow riding. He failed to come off throttle and smashed her leg between the boat and the dock. After administering first aid and dispatching medical we were able to turn her over to the medics and deal with Operator. Dep. performed SFST's and determined he was not intoxicated. After discussing the incident with him, I determined he had been operating his vessel negligently and caused bodily injury due to his allowing someone on his vessel to bow ride. He was cited with gross negligent operations.