Kalihiwai, HI Coastal Erosion Rate
Is the coast eroding 0.3 miles north of Kalihiwai, HI?
The coast 0.3 miles north of Kalihiwai, 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.
The grain of this number
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Kalihiwai, HI into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 22.22°N, 159.45°W. The survey behind it runs to 2007-2010, in USGS's Hawaii assessment, using the WLR method. Shoreline surveys aren't repeated every year, so this is the most recent long-term measurement USGS has published for this coast, not a live reading.
Where this fits nationally
Averaging 222 separate transects produced this segment's rate, with 82% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.2 ft/yr. Taken at face value, this segment's raw -0.11 ft/yr reading would land it 635 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 1118 nationally for growth belongs to Marina del Rey, CA, 2608 miles from this stretch, measured at 1.07 ft/yr. 1.1 miles away, Princeville, HI is the nearest other measured stretch: also no significant trend.
One address near Kalihiwai: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.