Davenport, CA Coastal Erosion Rate
What USGS measures 0.8 miles west of Davenport, CA
The coast 0.8 miles west of Davenport, 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 "Davenport" means on this page
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Davenport, CA into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 37.01°N, 122.20°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.
How solid is this number
35 transects feed this segment's number; 94% of them individually measured retreat. The published margin on this reading runs ±0.23 ft/yr. Taken at face value, this segment's raw -0.22 ft/yr reading would land it 488 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. Rank 990 nationally for growth belongs to Fort Myers Beach, FL, 2455 miles from this stretch, measured at 0.39 ft/yr. 1.5 miles away, Davenport, CA is the nearest other measured stretch: also no significant trend.
Not this whole stretch, just Davenport itself: the Coastal Change Hazards Portal is USGS's own live version of this data.