Manzanita, OR Coastal Erosion Rate
What USGS measures 1.1 miles south of Manzanita, OR
Unusual good news for this stretch: the shoreline 1.1 miles south of Manzanita, OR has grown by a measured 1.28 feet a year on average, per USGS's long-term transect data for this section. At that rate, the shoreline has gained roughly 12.8 feet over the last decade.
What "Manzanita" means on this page
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 Manzanita, OR. Centered near 45.70°N, 123.93°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 1.28 ft/yr accretion rate 1.1 miles south of Manzanita, OR for 25 years would add roughly 32 feet of shoreline, again assuming nothing about the local sediment supply changes.
Where this fits nationally
This reading comes from 109 individual transects averaged together, 0% of which measured erosion rather than growth. The published margin on this reading runs ±0.65 ft/yr. Among the 1211 US coastal segments with a measurable trend, this one ranks 1133 for erosion, 1 being the fastest-retreating coast in the dataset. Source: USGS Open-File Report 2012-1008. Mexico Beach, FL sits at national rank 1142 for growth (1.54 ft/yr), one reference point among the 1211 scored segments, 2335 miles from here. 3 miles away, Neahkahnie, OR is the nearest other measured stretch: also no significant trend.
One address near Manzanita: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.