Cleone, CA Coastal Erosion Rate
Is the coast eroding 4 miles north of Cleone, CA?
Unusual good news for this stretch: the shoreline 4 miles north of Cleone, CA has grown by a measured 0.4 feet a year on average, per USGS's long-term transect data for this section. At that rate, the shoreline has gained roughly 4 feet over the last decade.
What "Cleone" means on this page
Cleone, CA is the nearest named place, 4 miles away, to a ~3.5-mile stretch of coast USGS has surveyed - the reading below covers that whole stretch, not a single property in it. Segment center: 39.55, -123.77. Survey years: 1852-2016, method LRR, from USGS's California shoreline-change assessment. That's how current the data is here, real, but not a live feed, since a shoreline survey is a major undertaking, not an annual check-in.
What 0.4 ft/yr means over time
Holding the 0.4 ft/yr accretion rate 4 miles north of Cleone, CA for 25 years would add roughly 10 feet of shoreline, again assuming nothing about the local sediment supply changes.
What backs this reading up
80 transects feed this segment's number; 14% of them individually measured retreat. USGS's confidence interval here is ±0.36 ft/yr. This segment ranks 997 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. Rank 1132 nationally for growth belongs to Old Orchard Beach, ME, 2728 miles from this stretch, measured at 1.28 ft/yr, 3.2x this stretch's rate. 1.5 miles away, Cleone, CA is the nearest other measured stretch: also no significant trend.
One address near Cleone: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.