On July 1, 2011 at approximately 21:30, operator was operating his vessel IA 1896AU.  He was passing from East Lake Okoboji into West Lake Okoboji under HWY 71 bridge.  He felt that there was not adequate space for him and his vessel to pass under the bridge due to a vessel coming in the other direction.

operator put his vessel into a hard reverse, which placed his lower units into the rocks and shallow water near The Wharf restaurant.
Okoboji                       