Treasure Island, FL Coastal Erosion Rate
Shoreline change 1.2 miles north of Treasure Island, FL
Good news, and an honest one: USGS's data can't distinguish this stretch, 1.2 miles north of Treasure Island, FL, from a flat trend. Whatever small movement it measured here is statistical noise, not a reliable direction, so none is claimed.
What this reading actually covers
USGS surveys the coast in transects spaced a few hundred feet apart; this page groups the nearest ones into a single ~3.5-mile reading for the stretch closest to Treasure Island, FL, rather than showing one arbitrary line. Segment center: 27.78, -82.77. 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.
Where this fits nationally
39 transects feed this segment's number; 0% of them individually measured retreat. The published margin on this reading runs ±2.5 ft/yr. The unadjusted figure here, 2.49 ft/yr, would place it 1174 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: Long Beach, CA, 2132 miles away, ranks 1135 of 1211 nationally for growth, 1.31 ft/yr. 2.5 miles away, Redington Beach, FL is the nearest other measured stretch: also no significant trend.
One address near Treasure Island: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.