Mantoloking, NJ Coastal Erosion Rate
Shoreline change 0.8 miles southwest of Mantoloking, NJ
Good news, and an honest one: USGS's data can't distinguish this stretch, 0.8 miles southwest of Mantoloking, NJ, from a flat trend. Whatever small movement it measured here is statistical noise, not a reliable direction, so none is claimed.
What "Mantoloking" 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 Mantoloking, NJ, rather than showing one arbitrary line. Segment center: 40.05, -74.06. The survey behind it runs to 2007-2009, in USGS's New England / Mid-Atlantic assessment, using the LRR method. Shoreline surveys aren't repeated every year, so this is the most recent long-term measurement USGS has published for this coast, not a live reading.
How solid is this number
113 transects feed this segment's number; 100% of them individually measured retreat. Uncertainty on this specific number: 0.38 ft/yr either side. The unadjusted figure here, -0.33 ft/yr, would place it 392 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. Dunes City, OR sits at national rank 1058 for growth (0.67 ft/yr), one reference point among the 1211 scored segments, 2547 miles from here. Dover Beaches North, NJ, 3.2 miles off, is the adjacent measured stretch, itself no significant trend.
One address near Mantoloking: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.