Cleone, CA Coastal Erosion Rate
Is the coast eroding 8.7 miles north of Cleone, CA?
8.7 miles north of Cleone, CA: USGS's transects didn't pick up a trend here that beats the survey's own uncertainty. That's the majority case nationally, and for this stretch specifically it means the coast is holding, not that the data failed to find anything.
The grain of this number
This is a roughly 3.5-mile stretch of coast, not one address or parcel - USGS's own transects run every few hundred feet, but that's finer than any one property needs, so this page reports the stretch nearest Cleone, CA. Centered near 39.62°N, 123.78°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.
How solid is this number
38 transects feed this segment's number; 43% of them individually measured retreat. USGS's confidence interval here is ±0.7 ft/yr. Taken at face value, this segment's raw 0.06 ft/yr reading would land it 827 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. Rank 1005 nationally for growth belongs to Camp Pendleton South, CA, 558 miles from this stretch, measured at 0.44 ft/yr. Cleone, CA, 2.6 miles off, is the adjacent measured stretch, reading slight erosion at 0.42 ft/yr.
One address near Cleone: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.