Vessel was being operated at a planing speed during the hours of darkness.  The operator of the vessel drove the boat into a large mooring buoy at the north end of Lake Washington.  This buoy is listed on nautical charts and is for the securing of gravel barges for a business near the crash location.  The vessel capsized throwing all of the occupants into the water.  All passengers were able to put on a PFD and were rescued.  All passengers had been consuming alcohol including the operator.  The passengers all declined medical treatment and it was later learned at least one of the passengers had a broken ankle with ligament damge that required surgery.  Approximately one hour and forty minutes after the accident. the operator of the boat at the time of the accident provided a breath sample on a portable breath tester.  His blood alcohol level.  .059.
Kenmore                       