Indiana Harbor and Canal Obstruction

To Whom It May Concern,

All navigation interests are to be advised of an obstruction within the navigation channel of the Indiana Harbor and Canal. The obstruction was identified during the hydrographic survey of the project conducted in April 2024. The obstruction ID/name, coordinates, date of survey, and shallowest depth in feet International Great Lakes Datum 1985 (ft, IGLD) is summarized in the table below. The attached PDF drawings show the approximate location and size of the obstruction.

Name Latitude Longitude Survey Date Elevation (ft, IGLD)
OBST-1 N41° 38' 55.19" W87° 28' 05.49" 11-Apr-2024 -12.9


Kristine Meyer
Lake Michigan Project Office Chief
Office: (312) 835-0553