Amagansett, NY Coastal Erosion Rate
What USGS measures 0.8 miles southeast of Amagansett, NY
Nothing alarming measured 0.8 miles southeast of Amagansett, NY: 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.
The grain of this number
Amagansett, NY is the nearest named place, 0.8 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: 40.97, -72.12. USGS's New England / Mid-Atlantic assessment last surveyed this stretch through 2007-2009, 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.
What backs this reading up
Averaging 13 separate transects produced this segment's rate, with 31% individually reading as erosion, rather than relying on any single survey line. The published margin on this reading runs ±0.13 ft/yr. The unadjusted figure here, 0.09 ft/yr, would place it 842 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 2010-1119. Rank 1102 nationally for growth belongs to Camp Pendleton South, CA, 2524 miles from this stretch, measured at 0.98 ft/yr. 1.4 miles away, Amagansett, NY is the nearest other measured stretch: also no significant trend.
One address near Amagansett: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.