Marmora, NJ Coastal Erosion Rate
Shoreline change 1.8 miles southeast of Marmora, NJ
Nothing alarming measured 1.8 miles southeast of Marmora, NJ: whatever shift USGS's transects picked up here is too small to call reliably one way or the other, which this site reports as "no significant trend" rather than forcing a direction.
The grain of this number
Marmora, NJ is the nearest named place, 1.8 miles away, to a ~3.5-mile stretch of coast USGS has surveyed - the reading below covers that whole stretch, not a single property in it. Segment center: 39.24, -74.64. 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.
Where this fits nationally
Averaging 68 separate transects produced this segment's rate, with 60% individually reading as erosion, rather than relying on any single survey line. The published margin on this reading runs ±0.3 ft/yr. The unadjusted figure here, -0.06 ft/yr, would place it 697 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. Rank 969 nationally for growth belongs to Portsmouth, NH, 331 miles from this stretch, measured at 0.32 ft/yr. 2.3 miles away, Ocean City, NJ is the nearest other measured stretch: accretion (beach growing) at 1.02 ft/yr.
Marmora, NJ on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.