RedactedNarrative: On November 11, 2016 at approximately 1230 hours, I was dispatched by Glen Canyon NRA dispatch to Executive Services at Bullfrog Cover Slips Marina for a boat accident. I arrived on scene and was informed by the Executive Services Office, the houseboat docked on HB5 on "G: dock was turning into the slip and lost power. The houseboat began drifting and collided with the vessel parked at the end on "B", ripping off the anchor attachment on the bow.
  
  I contacted the houseboat on "G" dock at slip and located the operator. Operator2 stated the houseboat had only one engine working out of the two. He had come through the tire wall into the marina and was going to attempt a sharp turn to the starboard to face the lakeside of the dock. 
  
  He was then going to put the vessel in reverse to help with the turn, but the engine died. Before he could get it working again, he drifted toward "B" dock and collided with the vessel docked at the end. Operator2 informed me the forward port side railing and fabric caught the anchor on the docked vessel and ripped it off the vessel. 
  
  Operator2 was able to regain control of the houseboat, and dock it at slip on "G" dock. Operator2 informed me the only damage he observed on the houseboat was the ripped fabric around the bow railing and the bent aluminum tubing which the gate was attached. I conducted a vessel inspection and found the following discrepancies, no coast guard approved type 4 floatation device on board, no bell, or any registration and insurance paperwork on board.
  
  I then located the vessel docked on "B" dock. The vessel was docked in slip and was unoccupied. I observed the anchor was hanging on the port side of the vessel as well as damage to the bow where the anchor was fastened. I documented the damage and received the owner's information from Executive Service.
  
  On November 12, 2016 at approximately 0915 hours, I was informed by Executive Service the owners of the vessel were at their vessel, I contacted the owner. Owner1 informed me the only damage he could see was the damage on the bow as well as the fiberglass fractures on the swim platform. Owner1 stated the fracture marks were not there last time he docked his vessel. Also, there were smudge marks and markings from the dock where the swim platform hit the dock. I observed Owner1 had placed a white buoy in the past to prevent his swim platform from hitting the dock. It appeared the vessel was pushed back hard, causing the dock lines to stretch as well as the swim platform pushing the white buoy under it to hit the dock.
  
  
  VOLUNTARY STATEMENT: occupant on v2
  I was riding on the top deck while Operator2 was driving the houseboat from the buoy to the slip at Executive Services. While turning into out slip the houseboat swung wide hitting the slip and boat on the far side of where we were headed. The port side of our boat hit the awning of the slip and the bow of the boat parked in the slip. I understand one of our two engines was not working which limited maneuverability.
  
  VOLUNTARY STATEMENT:. Operator2
  I was piloting the next wave houseboat toward the houseboat rental slip. Moving at low, wake less speed. Shifting engine into reverse in order to turn toward the slip. As I shifted the engine stalled. The second engine was not running. As I attempted to restart the engine the boat drifted about 150 feet and collided with the bow and anchor of a boat that was parked in a slip.