Sand compaction measurements

USGS biologists (two on right), USFWS biologist (in middle, grey shirt) and engineers from the U.S. Army Corps of Engineers (USACE; two on left) measuring compaction along Panama City Beach, Florida immediately prior to initiation of a beach nourishment project. The USACE engineers are using a standard cone penetrometer while USGS biologists are using a dynamic cone penetrometer. (Credit: Margaret Lamont, USGS)