I spotted this boat from a long way off and drove over there for the photos. Having grown up around boats I am keen to have a look. So sad to see this, the boat should be down the hill afloat on Lake Mead! She’s an older small yacht with twin screws. Notice the left-hand and right-hand rotation of the propellers. This prevents the props from causing the boat to “walk” one way or the other so the boat can travel in a straight line.