Yarmouth Port, MA Coastal Erosion Rate
What USGS measures 4.1 miles west of Yarmouth Port, MA
Good news, and an honest one: USGS's data can't distinguish this stretch, 4.1 miles west of Yarmouth Port, MA, from a flat trend. Whatever small movement it measured here is statistical noise, not a reliable direction, so none is claimed.
What this reading actually covers
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 Yarmouth Port, MA, rather than showing one arbitrary line. Segment center: 41.72, -70.30. 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.
Where this fits nationally
This reading comes from 68 individual transects averaged together, 57% of which measured erosion rather than growth. The published margin on this reading runs ±0.3 ft/yr. The unadjusted figure here, -0.16 ft/yr, would place it 550 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 975 nationally for growth belongs to Cinco Bayou, FL, 1196 miles from this stretch, measured at 0.34 ft/yr. 0.9 miles up the coast, Barnstable Town, MA shows the same lack of a significant trend.
One address near Yarmouth Port: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.