RedactedNarrative: Vessel 1 was traveling about 30 miles per hour southbound by sunshine beach on treasure island. The army corps of engineers is conducting a beach re-nourishment project in this area and there is a submerged pipe that extends from on the beach westward several hundred yards out into the gulf of mexico to move sand from on offshore dredge. This is marked by several large orange buoys. There is also a piece of this pipe a short way out from the shore which sticks up vertically out of the water and vessel 1 traveled between it and the shoreline. It should be noted that the tide had been going out at the time and thus was shallower than when the driver of vessel 1 had traversed the area earlier that day. When vessel 1 drove over the dredge pipe the lower unit of the outboard motor hit the top of the pipe tearing off the lower unit, this then caused the motor to pitch upward smashing the forward part of the cowling onto the after deck edge damaging the top parts of the engine and damaging the fiberglass edge.