Gilgo, NY Coastal Erosion Rate
Is the coast eroding 0.8 miles southeast of Gilgo, NY?
The coast 0.8 miles southeast of Gilgo, NY has been retreating at a measured 3.62 feet a year, USGS's own long-term rate for this stretch, built from historical shoreline positions rather than a single survey. At that rate, the shoreline has lost roughly 36.2 feet over the last decade.
What "Gilgo" 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 Gilgo, NY. Centered near 40.63°N, 73.38°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.
25 years at this rate
If 3.62 ft/yr holds for the next 25 years, the coast 0.8 miles southeast of Gilgo, NY would retreat roughly 91 more feet, a projection, not a certainty: erosion rates shift with storms, sediment supply and any armoring built in the meantime.
Where this fits nationally
This reading comes from 8 individual transects averaged together, 100% of which measured erosion rather than growth. Uncertainty on this specific number: 0.93 ft/yr either side. Sorted from fastest erosion to fastest growth across all 1211 measured segments nationally, this one lands at 79. Source: USGS Open-File Report 2010-1119. Montauk, NY sits at national rank 415 for erosion (0.28 ft/yr), one reference point among the 1211 scored segments, 83 miles from here. 1.3 miles up the coast, Gilgo, NY shows 3.5 ft/yr of eroding.
One address near Gilgo: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.