Quinby, VA Coastal Erosion Rate
What USGS measures 8.6 miles south of Quinby, VA
Unusual good news for this stretch: the shoreline 8.6 miles south of Quinby, VA has grown by a measured 3.29 feet a year on average, per USGS's long-term transect data for this section. At that rate, the shoreline has gained roughly 32.9 feet over the last decade.
What "Quinby" means on this page
Quinby, VA is the nearest named place, 8.6 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: 37.44, -75.68. 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.
What 3.29 ft/yr means over time
Holding the 3.29 ft/yr accretion rate 8.6 miles south of Quinby, VA for 25 years would add roughly 82 feet of shoreline, again assuming nothing about the local sediment supply changes.
How solid is this number
Averaging 38 separate transects produced this segment's rate, with 8% individually reading as erosion, rather than relying on any single survey line. Uncertainty on this specific number: 1.72 ft/yr either side. This segment ranks 1184 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS Open-File Report 2010-1119. Rank 1106 nationally for growth belongs to Channel Islands Beach, CA, 2429 miles from this stretch, measured at 0.99 ft/yr, 0.3x this stretch's rate. Quinby, VA, 1.7 miles off, is the adjacent measured stretch, reading accretion (beach growing) at 3.21 ft/yr.
Not this whole stretch, just Quinby itself: the Coastal Change Hazards Portal is USGS's own live version of this data.