Carrabelle, FL Coastal Erosion Rate
Is the coast eroding 4.8 miles southeast of Carrabelle, FL?
The coast 4.8 miles southeast of Carrabelle, FL shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
The grain of this number
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Carrabelle, FL into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 29.83°N, 84.59°W. Survey years: 2001, method LRR, from USGS's Gulf of Mexico shoreline-change assessment. That's how current the data is here, real, but not a live feed, since a shoreline survey is a major undertaking, not an annual check-in.
What backs this reading up
39 transects feed this segment's number; 56% of them individually measured retreat. Uncertainty on this specific number: 0.58 ft/yr either side. Taken at face value, this segment's raw -0.28 ft/yr reading would land it 412 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2004-1089. Margate City, NJ sits at national rank 1076 for growth (0.8 ft/yr), one reference point among the 1211 scored segments, 872 miles from here. 0.8 miles away, Carrabelle, FL is the nearest other measured stretch: slight erosion at 0.52 ft/yr.
One address near Carrabelle: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.