On September 15,2012 operator was travelling southbound on the Chicago River. As his vessel approached Ozinga Concrete at milemarker 323, the boat came to a sudden stop throwing both occupants out of their seats and caused the vessel to strike concrete wall. The vessel had become entangled in mooring lines that were floating just under the surface of the water. These mooring lines were attached to a wall owned by Ozinga Concrete and when in use, they are used to tie up barges. The lines fouled the props and caused the engines to fail.
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