RedactedNarrative: Vessel 1 was drifting close to a dock located at N Elime Rd in Antioch. After reversing the boat S/B for an unknown reason, V1 accelerated quickly NW and struck the pier and boat lift. V1 rode onto the dock and came to a stop on top of vessel 2 which was parked (unoccupied) tied to the dock facing west. No injuries reported. Vessel 1 was towed from the scene by the Boat Yard Antioch.