Inwood, NY Coastal Erosion Rate
Is the coast eroding 6.6 miles southwest of Inwood, NY?
The coast 6.6 miles southwest of Inwood, NY is actually gaining ground, not losing it: USGS's transects measure 0.59 feet of accretion a year here, sediment building up rather than washing away. At that rate, the shoreline has gained roughly 5.9 feet over the last decade.
What "Inwood" means on this page
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: 40.57, -73.86. Survey years: 2007-2009, method LRR, from USGS's New England / Mid-Atlantic shoreline-change assessment. That's how current the data is here, real, but not a live feed, since a shoreline survey is a major undertaking, not an annual check-in.
What 0.59 ft/yr means over time
Holding the 0.59 ft/yr accretion rate 6.6 miles southwest of Inwood, NY for 25 years would add roughly 15 feet of shoreline, again assuming nothing about the local sediment supply changes.
What backs this reading up
Averaging 41 separate transects produced this segment's rate, with 32% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.5 ft/yr. Sorted from fastest erosion to fastest growth across all 1211 measured segments nationally, this one lands at 1042. Source: USGS Open-File Report 2010-1119. Orick, CA sits at national rank 1153 for growth (1.86 ft/yr), one reference point among the 1211 scored segments, 2582 miles from here. New York, NY, 1 miles off, is the adjacent measured stretch, itself no significant trend.
One address near Inwood: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.