Amagansett, NY Coastal Erosion Rate
Is the coast eroding 1.8 miles southwest of Amagansett, NY?
1.8 miles southwest of Amagansett, NY: 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 "Amagansett" means on this page
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 Amagansett, NY. Centered near 40.96°N, 72.15°W. 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
This reading comes from 95 individual transects averaged together, 46% of which measured erosion rather than growth. Uncertainty on this specific number: 0.18 ft/yr either side. Taken at face value, this segment's raw 0.01 ft/yr reading would land it 781 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2010-1119. Fields Landing, CA sits at national rank 1085 for growth (0.85 ft/yr), one reference point among the 1211 scored segments, 2682 miles from here. 1.7 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.