Grayland, WA Coastal Erosion Rate
Shoreline change 2.9 miles south of Grayland, WA
The coast 2.9 miles south of Grayland, WA is actually gaining ground, not losing it: USGS's transects measure 2.4 feet of accretion a year here, sediment building up rather than washing away. At that rate, the shoreline has gained roughly 24 feet over the last decade.
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 Grayland, WA. Centered near 46.80°N, 124.09°W. USGS's Pacific Northwest assessment last surveyed this stretch through 2002-2011, computing the rate with its LRR method. Other US regions were surveyed in different years, sometimes decades apart, so this page states its own rather than implying one national vintage.
25 years at this rate
Holding the 2.4 ft/yr accretion rate 2.9 miles south of Grayland, WA for 25 years would add roughly 60 feet of shoreline, again assuming nothing about the local sediment supply changes.
How solid is this number
Averaging 101 separate transects produced this segment's rate, with 16% individually reading as erosion, rather than relying on any single survey line. Uncertainty on this specific number: 1.24 ft/yr either side. This segment ranks 1173 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS Open-File Report 2012-1008. Tokeland, WA sits at national rank 1200 for growth (5.19 ft/yr), one reference point among the 1211 scored segments, 3 miles from here. 3.3 miles up the coast, Tokeland, WA shows 5.19 ft/yr of accreting.
Grayland, WA on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.