Mokuleia, HI Coastal Erosion Rate
What USGS measures 4.9 miles southwest of Mokuleia, HI
The coast 4.9 miles southwest of Mokuleia, 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 "Mokuleia" means on this page
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Mokuleia, HI into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 21.54°N, 158.24°W. 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.
Where this fits nationally
This reading comes from 108 individual transects averaged together, 84% of which measured erosion rather than growth. USGS's confidence interval here is ±0.35 ft/yr. Taken at face value, this segment's raw -0.27 ft/yr reading would land it 427 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 1119 nationally for growth belongs to Chincoteague, VA, 4945 miles from this stretch, measured at 1.09 ft/yr. 2.6 miles away, Mokuleia, HI is the nearest other measured stretch: slight erosion at 0.33 ft/yr.
Not this whole stretch, just Mokuleia itself: the Coastal Change Hazards Portal is USGS's own live version of this data.