Miramar Beach, FL Coastal Erosion Rate
What USGS measures 6.8 miles east of Miramar Beach, FL
6.8 miles east of Miramar Beach, 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 Miramar Beach, FL. Centered near 30.37°N, 86.23°W. 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 21 separate transects produced this segment's rate, with 81% individually reading as erosion, rather than relying on any single survey line. Uncertainty on this specific number: 0.32 ft/yr either side. Taken at face value, this segment's raw -0.06 ft/yr reading would land it 694 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2004-1089. For scale: Tiki Island, TX, 517 miles away, ranks 1161 of 1211 nationally for growth, 2.15 ft/yr. 1.6 miles up the coast, Miramar Beach, FL shows the same lack of a significant trend.
One address near Miramar Beach: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.