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.

Whiskey Bay to Krotz Springs
   Survey title Survey date
       Sheet Name    River Mile PDF XYZ SHP
Atchafalaya River
   50 Mile Point - Sh. 41 08/15/2014
       AS_41_W2K    MM 50.0 to 52.0 PDF XYZ Shape
   50 Mile Point - Sh. 42 08/15/2014
       AS_42_W2K    MM 48.0 to 50.0 PDF XYZ Shape