Hanapepe, HI Coastal Erosion Rate
What USGS measures 1.3 miles southwest of Hanapepe, HI
Nothing alarming measured 1.3 miles southwest of Hanapepe, HI: 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.
What this reading actually covers
Hanapepe, HI is the nearest named place, 1.3 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: 21.90, -159.60. Survey years: 2007-2010, method WLR, from USGS's Hawaii shoreline-change assessment. That's how current the data is here, real, but not a live feed, since a shoreline survey is a major undertaking, not an annual check-in.
Where this fits nationally
This reading comes from 70 individual transects averaged together, 81% of which measured erosion rather than growth. Uncertainty on this specific number: 0.23 ft/yr either side. The unadjusted figure here, -0.23 ft/yr, would place it 471 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 2011-1009. For scale: Oyehut, WA, 2624 miles away, ranks 1208 of 1211 nationally for growth, 7.54 ft/yr. 2.6 miles away, Kaumakani, HI is the nearest other measured stretch: also no significant trend.
One address near Hanapepe: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.