Fort Dick, CA Coastal Erosion Rate
What USGS measures 2.8 miles southwest of Fort Dick, CA
2.8 miles southwest of Fort Dick, CA: USGS's transects didn't pick up a trend here that beats the survey's own uncertainty. That's the majority case nationally, and for this stretch specifically it means the coast is holding, not that the data failed to find anything.
The grain of this number
This is a roughly 3.5-mile stretch of coast, not one address or parcel - USGS's own transects run every few hundred feet, but that's finer than any one property needs, so this page reports the stretch nearest Fort Dick, CA. Centered near 41.85°N, 124.22°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.
What backs this reading up
This reading comes from 102 individual transects averaged together, 32% of which measured erosion rather than growth. USGS's confidence interval here is ±0.16 ft/yr. Taken at face value, this segment's raw 0.09 ft/yr reading would land it 846 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. Fields Landing, CA sits at national rank 1085 for growth (0.85 ft/yr), one reference point among the 1211 scored segments, 79 miles from here. 1.8 miles up the coast, Fort Dick, CA shows the same lack of a significant trend.
One address near Fort Dick: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.