The second vessel had gotten ski rope caught round there prop.  The first vessel started to tow vessel 2 into Utah Lake State Park Marina.  The second boat while being towed had taken a wave over the bow.  The vessel 2 decided to stop being towed, and vessel 1 start to take passengers from vessel 2.  Vessel 1 had up to 21 people on  when they took a wave over the bow.  The bilge could not to keep up/stopped working as they took on more water.  The boat quickly sank.
PROVO                         