Diamond Beach, NJ Coastal Erosion Rate
What USGS measures 0.3 miles northwest of Diamond Beach, NJ
The coast 0.3 miles northwest of Diamond Beach, NJ shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
What this reading actually covers
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Diamond Beach, NJ into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 38.96°N, 74.86°W. 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.
What backs this reading up
Averaging 80 separate transects produced this segment's rate, with 18% individually reading as erosion, rather than relying on any single survey line. Uncertainty on this specific number: 1.62 ft/yr either side. Taken at face value, this segment's raw 1.6 ft/yr reading would land it 1144 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2010-1119. Rank 1204 nationally for growth belongs to Long Beach, WA, 2510 miles from this stretch, measured at 5.97 ft/yr. 1.8 miles up the coast, Wildwood Crest, NJ shows 3.33 ft/yr of accreting.
One address near Diamond Beach: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.