Southwest Pass survey data is referenced to Louisiana South State Plane Coordinates North American Data 1983 with sounding reference below Mean Lower Low Water in U.S. Survey Feet unless otherwise noted on the plan sheet.

South and Southwest Pass
   Survey title Survey date Survey date
       Sheet Name    River Mile Profile Cross-Sections & C/L Profile
Southwest Pass (MLLW)
   Sheet 1 05/15/2025 06/25/2025
       SW_01_SWP    MM 13.4-10.5 AHP PDF XYZ Shape PDF XYZ Shape
   Sheet 2 05/08/2025 06/25/2025
       SW_02_SWP    MM 10.5-7.7 AHP PDF XYZ Shape PDF XYZ Shape
   Sheet 3 05/08/2025 06/25/2025
       SW_03_SWP    MM 7.7-4.8 AHP PDF XYZ Shape PDF XYZ Shape
   Sheet 4 - Cubit's Gap 05/08/2025 07/03/2025
       SW_04_SWP    MM 4.8-2.0 AHP PDF XYZ Shape PDF XYZ Shape
   Sheet 5 - Head of Passes 05/07/2025 07/03/2025
       SW_05_SWP    MM 2.0-1.0 AHP PDF XYZ Shape PDF XYZ Shape
   Sheet 6 05/07/2025 07/01/2025
       SW_06_SWP    MM 1.0-3.7 PDF XYZ Shape PDF XYZ Shape
   Sheet 7 05/07/2025 07/01/2025
       SW_07_SWP    MM 3.7-6.7 PDF XYZ Shape PDF XYZ Shape