Survey data on PDFs is referenced to Louisiana South State Plane Coordinates North American Datum 1983 with soundings referenced below Low Water Reference Plane 2007 via N.A.V.D. gage in U.S. Survey Feet. XYZ files are in U.S. Survey feet referenced to N.A.V.D unless otherwise noted.

Mississippi River Shallow Draft
   Survey title Survey date Survey date
       Sheet Name    River Mile Recon - Profile Only Full Survey
Mississippi River Shallow Draft Crossings
   Old River Control 07/25/2019 04/28/2021
       MS_07_OLD    MM 315 to 309.5 PDF XYZ Shape PDF XYZ Shape
   Fort Adams Reach 07/25/2019 04/29/2021
       MS_08_FAR    MM 309.5 to 305 PDF XYZ Shape PDF XYZ Shape
   Smithland - Sh. 1 07/23/2019 04/27/2021
       MS_09_SM1    MM 305 to 300 PDF XYZ Shape PDF XYZ Shape
   Smithland - Sh. 2 07/24/2019 04/27/2021
       MS_10_SM2    MM 300 to 296 PDF XYZ Shape PDF XYZ Shape
   Smithland - Sh. 3 08/06/2020 04/26/2021
       MS_11_SM3    MM 296 to 291 PDF XYZ Shape PDF XYZ Shape
   Iowa Point - Sh. 3 mm/dd/yyyy 03/19/2021
       MS_17_IP3    MM 281 to 279 PDF XYZ Shape PDF XYZ Shape
   Bayou Sara 07/03/2019 04/09/2021
       MS_24_BYS    MM 267 to 264 PDF XYZ Shape PDF XYZ Shape
   Profit Island - Sh. 2 mm/dd/yyyy 09/21/2019
       MS_31_PI2    MM 252 to 250 PDF XYZ Shape PDF XYZ Shape
   Wilkerson Point 09/22/2020 04/08/2021
       MS_39_WIL    MM 236 to 233 PDF XYZ Shape PDF XYZ Shape