Big Lagoon, CA Coastal Erosion Rate
Shoreline change 0.4 miles southwest of Big Lagoon, CA
The coast 0.4 miles southwest of Big Lagoon, CA shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
What this reading actually covers
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Big Lagoon, CA into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 41.16°N, 124.14°W. 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.
Where this fits nationally
This reading comes from 84 individual transects averaged together, 100% of which measured erosion rather than growth. The published margin on this reading runs ±0.7 ft/yr. Taken at face value, this segment's raw -0.64 ft/yr reading would land it 253 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS National Shoreline Change data release (ScienceBase, DOI 10.5066/P94J0K7Z), Kratzmann 2024 / Data Report 1187. For scale: Inverness, CA, 220 miles away, ranks 959 of 1211 nationally for growth, 0.27 ft/yr. 1.7 miles up the coast, Big Lagoon, CA shows the same lack of a significant trend.
One address near Big Lagoon: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.