Davenport, CA Coastal Erosion Rate
Shoreline change 3 miles southeast of Davenport, CA
Good news, and an honest one: USGS's data can't distinguish this stretch, 3 miles southeast of Davenport, CA, from a flat trend. Whatever small movement it measured here is statistical noise, not a reliable direction, so none is claimed.
What this reading actually covers
USGS surveys the coast in transects spaced a few hundred feet apart; this page groups the nearest ones into a single ~3.5-mile reading for the stretch closest to Davenport, CA, rather than showing one arbitrary line. Segment center: 36.98, -122.16. 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.
How solid is this number
This reading comes from 33 individual transects averaged together, 61% of which measured erosion rather than growth. USGS's confidence interval here is ±0.37 ft/yr. The unadjusted figure here, -0.14 ft/yr, would place it 590 of 1211 if ranked directly - but an unreliable rank isn't a useful one, which is exactly why "no significant trend" is the headline instead. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. Pensacola Station, FL sits at national rank 1062 for growth (0.7 ft/yr), one reference point among the 1211 scored segments, 2034 miles from here. 1.4 miles up the coast, Davenport, CA shows the same lack of a significant trend.
Not this whole stretch, just Davenport itself: the Coastal Change Hazards Portal is USGS's own live version of this data.