St. George Island, FL Coastal Erosion Rate
What USGS measures 3.6 miles northeast of St. George Island, FL
Nothing alarming measured 3.6 miles northeast of St. George Island, 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 "St. George Island" means on this page
St. George Island, FL is the nearest named place, 3.6 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: 29.69, -84.85. USGS's Gulf of Mexico assessment last surveyed this stretch through 2001, computing the rate with its LRR method. Other US regions were surveyed in different years, sometimes decades apart, so this page states its own rather than implying one national vintage.
How solid is this number
Averaging 94 separate transects produced this segment's rate, with 55% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.23 ft/yr. The unadjusted figure here, -0.03 ft/yr, would place it 740 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: Redondo Beach, CA, 1983 miles away, ranks 1030 of 1211 nationally for growth, 0.53 ft/yr. St. George Island, FL, 2.1 miles off, is the adjacent measured stretch, itself no significant trend.
St. George Island, FL on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.