RedactedNarrative: At approximately 1320 hours on 06-16-2018, Game Warden and I were near the Cave Rock Boat Ramp on boat patrol at Lake Tahoe when we received a call for assistance from Glenbrook Marina staff. Staff reported that a boat had driven over mooring lines. Winds were 15-25 mph and approximate 3 feet swells were present on the lake.
  
  Game Warden and I responded to the scene arriving at approximately 1330 hours. We found V-1 facing in an easterly direction and held along the starboard side of V-2, which was attached to a mooring ball and facing in a westerly direction. The propeller of V-1 was apparently held in the mooring line of V-2. Wave and wind action was causing the starboard aft section of V-1 to strike the starboard bow area of V-2. D-1 and P-1 were attempting to keep the vessels from striking each other.  We assisted them in this effort by providing them two bumpers from our vessel.  Eventually the vessels were separated with the assistance of marina staff.
  
  V-1 Operator stated in-substance that he was away from the helm with V-1 in neutral and holding on to a mooring ball west of V-2 with a reach pole.  As he and his passenger were attaching the boat to the mooring ball, his passenger dropped an attachment pin and he lost hold of the mooring ball with his reach pole in heavy waves and wind.  V-1 then drifted in an easterly direction and the propeller of V-1 caught up in the mooring line of V-2. The waves and wind swung V-1 against V-2.
  
  V-1 passenger stated in-substance the same as the V-1 operator.
  
  V-2 was attached to a mooring line to a mooring ball and not occupied. 
  
  V-1 sustained approximately four x two feet of scratching to the fiberglass hull freeboard siding on its starboard aft side.  Additional approximate 15” by 6” scratching with red and white paint transfer was observed on the starboard stern gunnel and metal rub rail above the swim deck.
  
  V-2 sustained scratching damage to its starboard freeboard hull area, gunnel, and metal rub rail from bow to midships and starboard bow retractable cleat.
  
  Additional damage was caused to V-2 from V-1 following separation from the mooring line of V-2. Refer to Douglas County Sheriff''s Office Report # 18SO21611 for details.