Twin Lakes, CA Coastal Erosion Rate
What USGS measures 0.5 miles west of Twin Lakes, CA
Nothing alarming measured 0.5 miles west of Twin Lakes, 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 "Twin Lakes" means on this page
Twin Lakes, CA is the nearest named place, 0.5 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: 36.96, -122.00. 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 79 separate transects produced this segment's rate, with 42% individually reading as erosion, rather than relying on any single survey line. Uncertainty on this specific number: 0.37 ft/yr either side. The unadjusted figure here, 0.09 ft/yr, would place it 848 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. Saco, ME sits at national rank 962 for growth (0.3 ft/yr), one reference point among the 1211 scored segments, 2716 miles from here. Pleasure Point, CA, 2.4 miles off, is the adjacent measured stretch, reading slight erosion at 0.36 ft/yr.
Twin Lakes, CA on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.