Leggett, CA Coastal Erosion Rate
What USGS measures 7.4 miles west of Leggett, CA
The coast 7.4 miles west of Leggett, CA 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 Leggett, CA into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 39.84°N, 123.86°W. USGS's California assessment last surveyed this stretch through 1852-2016, computing the rate with its LRR method. Other US regions were surveyed in different years, sometimes decades apart, so this page states its own rather than implying one national vintage.
What backs this reading up
This reading comes from 64 individual transects averaged together, 73% of which measured erosion rather than growth. Uncertainty on this specific number: 0.3 ft/yr either side. Taken at face value, this segment's raw -0.29 ft/yr reading would land it 411 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. Mexico Beach, FL sits at national rank 1181 for growth (2.91 ft/yr), one reference point among the 1211 scored segments, 2258 miles from here. Leggett, CA, 2.4 miles off, is the adjacent measured stretch, itself no significant trend.
Leggett, CA on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.