RedactedNarrative: On May 22nd 2021, I, Game Warden 1, was Patrolling Lake Mead by patrol vessel. At approximately 1609 hours a call came out over the National Park Service (NPS) radio for a vessel accident with injury that happened in Gator Cove. The initial call stated a man was struck by a propellor while in gator cove with a lot of blood coming from his left leg. The operator of the vessel that struck the man self transported the victim to calville bay courtesy launch ramp where I made contact with them at approximately 1623 hours. I applied a tourniquet to the left leg as close to the groin as possible at approximately 1631 hours. The victim, later identified as Injured sustained multiple lacerations down the left sife of his leg, open fracture on his left arm, laceration to the abdimon causing his internals to spill out, and miltuple open fractures from the knee down. Trauma padding was applied to all open wounds and wrapped with medical tape. Injured was transported to NPS medics and then transported to mercy air at 1706. Injured was taken to UMC Trauma center for his wounds. After the initial medical call was over, I conducted the boat accident investigation and interviews. The operator of the vessel was identified as Operator. According to witness statements Operator was operating the vessel below a flat wake entering into gator cove at approximately 1405 hours. Operator operated the vessel in a reckless and negligent manner as Injured was hanging onto the ladder on the transom of the vessel next to the motor. Operator began to beach the vessel on land. Multiple parties they stated they tried to warn Operator there was a man hanging on the back of his vessel but due to the loud music coming from his boat they could not get his attention. Operator then increased his speed and RPM's in order to beach the vessel further on land. The propulsion from the propellor sucked Injured into the propellor causing the injuries. Operator was ran through Field Sobriety Test's and blew .000 on the PBT. A follow up with the hospital showed that Injured had his left leg amputated from the knee down, kidney and spleen removed, multiple fractures to the left diaphram, and an open fracture to the left arm. Multiple surgeries were performed and Injured is in stable condition as of 05/27/2021.