Port St. Joe, FL Coastal Erosion Rate
Is the coast eroding 10.9 miles southeast of Port St. Joe, FL?
Nothing alarming measured 10.9 miles southeast of Port St. Joe, FL: whatever shift USGS's transects picked up here is too small to call reliably one way or the other, which this site reports as "no significant trend" rather than forcing a direction.
What "Port St. Joe" means on this page
Port St. Joe, FL is the nearest named place, 10.9 miles away, to a ~3.5-mile stretch of coast USGS has surveyed - the reading below covers that whole stretch, not a single property in it. Segment center: 29.70, -85.19. The survey behind it runs to 2001, in USGS's Gulf of Mexico assessment, using the LRR method. Shoreline surveys aren't repeated every year, so this is the most recent long-term measurement USGS has published for this coast, not a live reading.
What backs this reading up
Averaging 73 separate transects produced this segment's rate, with 16% individually reading as erosion, rather than relying on any single survey line. Uncertainty on this specific number: 0.43 ft/yr either side. The unadjusted figure here, 0.13 ft/yr, would place it 872 of 1211 if ranked directly - but an unreliable rank isn't a useful one, which is exactly why "no significant trend" is the headline instead. Source: USGS Open-File Report 2004-1089. For scale: Camp Pendleton South, CA, 1907 miles away, ranks 1102 of 1211 nationally for growth, 0.98 ft/yr. Apalachicola, FL, 2.2 miles off, is the adjacent measured stretch, itself no significant trend.
One address near Port St. Joe: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.