Chirp Sub-Bottom Profile Geophysical Data Collected in 2024 Offshore of Breton Island, Louisiana

As part of the Breton Island Post Construction Monitoring project, scientists from the U.S. Geological Survey (USGS) St. Petersburg Coastal and Marine Science Center conducted a nearshore geophysical survey in August 2024 to map the borrow site created during the Breton Island, Louisiana (LA) restoration effort that began in December 2020. The restoration effort was part of the Deepwater Horizon oil spill settlement to restore natural resources and services injured by the spill. Following restoration, monitoring efforts of the island and surrounding seafloor are necessary to evaluate the programmatic goals of the restoration. This survey, funded by the Louisiana Outer Coast Restoration project, reoccupies a subset of sub-bottom profile tracklines originally acquired in August 2022, refer to Forde and others (2023) for details. The data provided in this publication provide baseline information regarding the physical structure of the dredge pit and help researchers monitor morphologic evolution over time.

This data release serves as an archive of sub-bottom profile and navigation data collected August 9, 2024, offshore of Breton Island, LA during USGS Field Activity Number 2024-320-FA. Data products, including chirp sub-bottom profile data and images, survey trackline map, location data with formal Federal Geographic Data Committee metadata, and field logs are provided.

Forde, A.S., Flocks, J.G., and Farmer, A.S., 2023, Archive of chirp subbottom profile data collected in 2022 from Breton Island, Louisiana: U.S. Geological Survey data release, https://doi.org/10.5066/P9Q28MFD.