Belleair, FL Coastal Erosion Rate
Shoreline change 1.8 miles north of Belleair, FL
1.8 miles north of Belleair, 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 Belleair, FL. Centered near 27.96°N, 82.82°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
This reading comes from 39 individual transects averaged together, 54% of which measured erosion rather than growth. USGS's confidence interval here is ±0.85 ft/yr. Taken at face value, this segment's raw -0.31 ft/yr reading would land it 398 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2004-1089. Rank 1156 nationally for growth belongs to Mexico Beach, FL, 212 miles from this stretch, measured at 2.02 ft/yr. 1.9 miles up the coast, Belleair Beach, FL shows the same lack of a significant trend.
Not this whole stretch, just Belleair itself: the Coastal Change Hazards Portal is USGS's own live version of this data.