RedactedNarrative: The vessel was rented from Las Vegas Boat Harbor.  While cruising at approximately 35 MPH, the vessel struck a submerged object in the area of Hamblin Bay on Lake Mead.  Estimated distance from shore at the time of collision was 60 feet.  Operator denied seeing the object that was struck neither before nor after the collision.  The vessel suffered disabling damage.  There was minor damage to the propeller and significant damage to the lower unit.  There were no injuries or ejections.  The vessel was towed back to Las Vegas Boat Harbor.