Princeville, HI Coastal Erosion Rate
What USGS measures 0.6 miles northeast of Princeville, HI
Nothing alarming measured 0.6 miles northeast of Princeville, 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.
The grain of this number
Princeville, HI is the nearest named place, 0.6 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: 22.23, -159.48. USGS's Hawaii assessment last surveyed this stretch through 2007-2010, computing the rate with its WLR method. Other US regions were surveyed in different years, sometimes decades apart, so this page states its own rather than implying one national vintage.
How solid is this number
Averaging 5 separate transects produced this segment's rate, with 80% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.13 ft/yr. The unadjusted figure here, -0.03 ft/yr, would place it 742 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. Rank 1028 nationally for growth belongs to Port Orford, OR, 2456 miles from this stretch, measured at 0.53 ft/yr. Princeville, HI, 0.7 miles off, is the adjacent measured stretch, itself no significant trend.
Not this whole stretch, just Princeville itself: the Coastal Change Hazards Portal is USGS's own live version of this data.