Tyndall AFB, FL Coastal Erosion Rate
What USGS measures 4.7 miles southeast of Tyndall AFB, FL
4.7 miles southeast of Tyndall AFB, FL: USGS's transects didn't pick up a trend here that beats the survey's own uncertainty. That's the majority case nationally, and for this stretch specifically it means the coast is holding, not that the data failed to find anything.
What this reading actually covers
This is a roughly 3.5-mile stretch of coast, not one address or parcel - USGS's own transects run every few hundred feet, but that's finer than any one property needs, so this page reports the stretch nearest Tyndall AFB, FL. Centered near 30.04°N, 85.55°W. 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.
Where this fits nationally
Averaging 79 separate transects produced this segment's rate, with 87% individually reading as erosion, rather than relying on any single survey line. The published margin on this reading runs ±4.2 ft/yr. Taken at face value, this segment's raw -3.36 ft/yr reading would land it 86 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2004-1089. Fort Dick, CA sits at national rank 970 for growth (0.32 ft/yr), one reference point among the 1211 scored segments, 2289 miles from here. 1.4 miles up the coast, Tyndall AFB, FL shows the same lack of a significant trend.
One address near Tyndall AFB: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.