Brigantine, NJ Coastal Erosion Rate
What USGS measures 1.7 miles northeast of Brigantine, NJ
The coast 1.7 miles northeast of Brigantine, NJ has been retreating at a measured 2.2 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 22 feet over the last decade.
What this reading actually covers
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 Brigantine, NJ. Centered near 39.43°N, 74.35°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 2.2 ft/yr holds for the next 25 years, the coast 1.7 miles northeast of Brigantine, NJ would retreat roughly 55 more feet, a projection, not a certainty: erosion rates shift with storms, sediment supply and any armoring built in the meantime.
What backs this reading up
This reading comes from 17 individual transects averaged together, 100% of which measured erosion rather than growth. Uncertainty on this specific number: 1.17 ft/yr either side. This segment ranks 123 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS Open-File Report 2010-1119. For scale: Hampton, NH, 308 miles away, ranks 454 of 1211 nationally for erosion, 0.24 ft/yr, 0.1x this stretch's rate. 1.2 miles away, Brigantine, NJ is the nearest other measured stretch: also no significant trend.
Brigantine, NJ on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.