Funding for this research was provided by the U.S. Geological Survey Coastal and Marine Geology Program and the U.S. Army Corps of Engineers Mobile District as part of the Mississippi Coastal Improvement Program (MsCIP). Assistance in the field and lab was provided by Emile Bergeron, Dana Weise, Phil Thompson, and Charles Worley of the USGS, and the captain and crew of the R/V Tommy Munro. The USGS photograph of the R/V Tommy Munro on the cover art of the index page and DVD jacket was taken by Charles Worley. This manuscript benefited from reviews by Seth Ackerman, Kate McMullen, and VeeAnn Cross.