Manchester, CA Coastal Erosion Rate
What USGS measures 5.3 miles north of Manchester, CA
Nothing alarming measured 5.3 miles north of Manchester, CA: whatever shift USGS's transects picked up here is too small to call reliably one way or the other, which this site reports as "no significant trend" rather than forcing a direction.
What this reading actually covers
Manchester, CA is the nearest named place, 5.3 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: 39.05, -123.69. The survey behind it runs to 1852-2016, in USGS's California assessment, using the LRR method. Shoreline surveys aren't repeated every year, so this is the most recent long-term measurement USGS has published for this coast, not a live reading.
Where this fits nationally
Averaging 56 separate transects produced this segment's rate, with 77% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.18 ft/yr. The unadjusted figure here, -0.13 ft/yr, would place it 606 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. For scale: North Wildwood, NJ, 2591 miles away, ranks 1193 of 1211 nationally for growth, 4.21 ft/yr. Manchester, CA, 2.8 miles off, is the adjacent measured stretch, reading slight erosion at 0.17 ft/yr.
One address near Manchester: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.