All survey systems and methods utilized during this survey are described in the report "13CCT01 Metadata" available at the URL below.All soundings were manually calculated to Mean Lower Low Water from NAVD88 due to a lack of VDatum coverage.A 10-meter grid of the Shark Island Bayou was created for data archival and charting purposes.United States Geological Surveyhttps://dx.doi.org/10.3133/ds835A team of scientists from the U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, collected 92 line-kilometers of dual-frequency single-beam bathymetry data in the tidal creeks, bayous, and coastal areas near Weeks Bay, southwest Louisiana. Limited bathymetry data exist for these tidally and meteorologically influenced shallow-water estuarine environments. In order to reduce the present knowledge gap, the objectives of this study were to (1) develop methods for regional inland bathymetry mapping and monitoring, (2) test inland bathymetry mapping system in pilot locations for integrating multiple elevation (aerial and terrestrial lidar) and bathymetry datasets, (3) implement inland bathymetry mapping and monitoring in highly focused sites, and (4) evaluate changes in bathymetry and channel-fill sediment storage using these methods. This survey does meet charting specifications and is adequate to supersede prior data.All data were reviewed for DTONs and none were identified in this survey.Pacific Hydrographic Branch2021-09-21PHBNancy T. DeWittPrinciple InvestigatorUnited States Geological SurveyShark Island BayoumetersNavigable AreaUS Geological SurveyProjected UTM 15Mean Lower Low Water2021-09-21W005802013-01-142013-01-18Pacific Hydrographic BranchNancy T. DeWittLouisianaAny revisions to the Descriptive Report (DR) applied during office processing are shown in red italic text. The DR is maintained as a field unit product, therefore all information and recommendations within this report are considered preliminary unless otherwise noted. The final disposition of survey data is represented in the NOAA nautical chart products. All pertinent records for this survey are archived at the National Centers for Environmental Information (NCEI) and can be retrieved via https://www.ncei.noaa.gov/. Products created during office processing were generated in NAD83 UTM 15N, MLLW. All references to other horizontal or vertical datums in this report are applicable to the processed hydrographic data provided by the field unit.Vermillion BayNorth American Datum 19832013SBESKnudsen Engineering320MESD-PHB-2120000