Princeville, HI Coastal Erosion Rate
Shoreline change 1 miles east of Princeville, HI
The coast 1 miles east of Princeville, HI shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
What this reading actually covers
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Princeville, HI into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 22.23°N, 159.47°W. 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.
What backs this reading up
Averaging 10 separate transects produced this segment's rate, with 100% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.17 ft/yr. Taken at face value, this segment's raw -0.12 ft/yr reading would land it 616 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2011-1009. Rank 1046 nationally for growth belongs to Mexico Beach, FL, 4554 miles from this stretch, measured at 0.6 ft/yr. 0.7 miles up the coast, Princeville, HI shows the same lack of a significant trend.
Princeville, HI on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.