Inwood, NY Coastal Erosion Rate
Shoreline change 3.2 miles southwest of Inwood, NY
3.2 miles southwest of Inwood, NY, the coast is advancing, not retreating, at a measured 0.91 feet a year, sediment accumulating faster than any erosion USGS recorded here. At that rate, the shoreline has gained roughly 9.1 feet over the last decade.
The grain of this number
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 Inwood, NY, rather than showing one arbitrary line. Segment center: 40.59, -73.80. 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 0.91 ft/yr means over time
Holding the 0.91 ft/yr accretion rate 3.2 miles southwest of Inwood, NY for 25 years would add roughly 23 feet of shoreline, again assuming nothing about the local sediment supply changes.
Where this fits nationally
81 transects feed this segment's number; 7% of them individually measured retreat. The published margin on this reading runs ±0.71 ft/yr. This segment ranks 1093 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS Open-File Report 2010-1119. Rank 1043 nationally for growth belongs to Inwood, NY, 2 miles from this stretch, measured at 0.59 ft/yr, 0.6x this stretch's rate. Inwood, NY, 2.1 miles off, is the adjacent measured stretch, reading slight accretion (beach growing) at 0.59 ft/yr.
Not this whole stretch, just Inwood itself: the Coastal Change Hazards Portal is USGS's own live version of this data.