Westport, WA Coastal Erosion Rate
Shoreline change 0.9 miles north of Westport, WA
0.9 miles north of Westport, WA: 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.
What this reading actually covers
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 Westport, WA. Centered near 46.90°N, 124.13°W. The survey behind it runs to 2002-2011, in USGS's Pacific Northwest 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.
How solid is this number
Averaging 11 separate transects produced this segment's rate, with 0% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±2.49 ft/yr. Taken at face value, this segment's raw 0.9 ft/yr reading would land it 1090 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2012-1008. Rank 1001 nationally for growth belongs to Bertsch-Oceanview, CA, 357 miles from this stretch, measured at 0.41 ft/yr. Westport, WA, 1.1 miles off, is the adjacent measured stretch, reading accretion (beach growing) at 1.25 ft/yr.
Westport, WA on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.