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 | 06/03/2026 | 07/29/2026 | ||||
| SW_01_SWP MM 13.4-10.5 AHP | XYZ | Shape | XYZ | Shape | ||
| Sheet 2 | 06/05/2026 | 07/29/2026 | ||||
| SW_02_SWP MM 10.5-7.7 AHP | XYZ | Shape | XYZ | Shape | ||
| Sheet 3 | 06/05/2026 | 07/30/2026 | ||||
| SW_03_SWP MM 7.7-4.8 AHP | XYZ | Shape | XYZ | Shape | ||
| Sheet 4 - Cubit's Gap | 06/02/2026 | 07/31/2026 | ||||
| SW_04_SWP MM 4.8-2.0 AHP | XYZ | Shape | XYZ | Shape | ||
| Sheet 5 - Head of Passes | 06/30/2026 | 08/03/2026 | ||||
| SW_05_SWP MM 2.0-1.0 AHP | XYZ | Shape | XYZ | Shape | ||
| Sheet 6 | 06/30/2026 | 07/30/2026 | ||||
| SW_06_SWP MM 1.0-3.7 | XYZ | Shape | XYZ | Shape | ||
| Sheet 7 | 06/02/2026 | 07/30/2026 | ||||
| SW_07_SWP MM 3.7-6.7 | XYZ | Shape | XYZ | Shape | ||
| Sheet 8 | 06/02/2026 | 08/03/2026 | ||||
| SW_08_SWP MM 6.7-9.6 | XYZ | Shape | XYZ | Shape | ||
| Sheet 9 | 06/02/2026 | 08/03/2026 | ||||
| SW_09_SWP MM 9.6-12.4 | XYZ | Shape | XYZ | Shape | ||
| Sheet 10 | 06/02/2026 | 07/23/2026 | ||||
| SW_10_SWP MM 12.4-15.2 | XYZ | Shape | XYZ | Shape | ||
| Sheet 11 | 06/02/2026 | 07/21/2026 | ||||
| SW_11_SWP MM 15.2-18.0 | XYZ | Shape | XYZ | Shape | ||
| Sheet 12 | 06/02/2026 | 07/29/2026 | ||||
| SW_12_SWP MM 18.0-21.0 | XYZ | Shape | XYZ | Shape | ||