Maalaea, HI Coastal Erosion Rate
Is the coast eroding 0.6 miles southwest of Maalaea, HI?
The coast 0.6 miles southwest of Maalaea, 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 "Maalaea" 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 Maalaea, HI into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 20.80°N, 156.50°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.
What backs this reading up
213 transects feed this segment's number; 97% of them individually measured retreat. USGS's confidence interval here is ±0.24 ft/yr. Taken at face value, this segment's raw -0.17 ft/yr reading would land it 540 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 1103 nationally for growth belongs to Huntington Beach, CA, 2509 miles from this stretch, measured at 0.98 ft/yr. 2.1 miles away, Maalaea, HI is the nearest other measured stretch: also no significant trend.
One address near Maalaea: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.