Jenner, CA Coastal Erosion Rate
Is the coast eroding 0.6 miles southwest of Jenner, CA?
Good news, and an honest one: USGS's data can't distinguish this stretch, 0.6 miles southwest of Jenner, CA, from a flat trend. Whatever small movement it measured here is statistical noise, not a reliable direction, so none is claimed.
What "Jenner" means on this page
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 Jenner, CA, rather than showing one arbitrary line. Segment center: 38.45, -123.13. 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.
Where this fits nationally
Averaging 45 separate transects produced this segment's rate, with 22% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.42 ft/yr. The unadjusted figure here, 0.26 ft/yr, would place it 952 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. Rank 1140 nationally for growth belongs to Costa Mesa, CA, 441 miles from this stretch, measured at 1.48 ft/yr. 1.3 miles up the coast, Jenner, CA shows the same lack of a significant trend.
One address near Jenner: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.