Survey data is referenced to Louisiana South State Plane Coordinates North American Datum 1983 with soundings referenced below Mean Low Gulf in U.S. Survey Feet.

Old River Lock Area
   Survey title Survey date
       Sheet Name    Stationing PDF XYZ SHP
   Old River Lock Forebay 08/07/2017
       OR_01_LFB    0+00 - 54+00 PDF XYZ Shape
   Old River Lock Tailbay 08/07/2017
       OR_02_LTB    70+00 - 179+50 PDF XYZ Shape
   Three Rivers - Sh. 3 08/07/2017
       OR_03_3R1    179+50 - 258+00 PDF XYZ Shape
   Three Rivers - Sh. 4 08/07/2017
       OR_04_3R2    258+00 - 369+85 PDF XYZ Shape