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.

Lower Calcasieu Ship Channel
   Survey title Survey date
       Sheet Name    River Mile PDF XYZ SHP
   Sheet 11 07/06/2017
       CR_11_LWR    MM 21 PDF XYZ Shape
   Sheet 12 07/06/2017
       CR_12_LWR    MM 19 to 20 PDF XYZ Shape
   Sheet 13 06/28/2017
       CR_13_LWR    MM 18 PDF XYZ Shape
   Sheet 14 06/28/2017
       CR_14_LWR    MM 17 PDF XYZ Shape
   Sheet 15 06/28/2017
       CR_15_LWR    MM 15 to 16 PDF XYZ Shape
   Sheet 16 06/28/2017
       CR_16_LWR    MM 14 to 15 PDF XYZ Shape
   Sheet 17 06/28/2017
       CR_17_LWR    MM 13 PDF XYZ Shape
   Sheet 18 06/29/2017
       CR_18_LWR    MM 11 to 12 PDF XYZ Shape
   Sheet 19 07/18/2017
       CR_19_LWR    MM 10 to 11 PDF XYZ Shape
   Sheet 20 07/18/2017
       CR_20_LWR    MM 9 PDF XYZ Shape
   Sheet 21 07/18/2017
       CR_21_LWR    MM 8 PDF XYZ Shape
   Sheet 22 07/18/2017
       CR_22_LWR    MM 6 to 7 PDF XYZ Shape
   Sheet 23 07/18/2017
       CR_23_LWR    MM 5 PDF XYZ Shape
   Sheet 24 05/09/2017
       CR_24_LWR    MM 4 PDF XYZ Shape
   Sheet 25 05/04/2017
       CR_25_GAP    MM 2 to 3 PDF XYZ Shape
   Sheet 26 05/04/2017
       CR_26_GAP    MM 1 PDF XYZ Shape
   Sheet 27 05/04/2017
       CR_27_GAP    MM 0 to (-1) PDF XYZ Shape