Heceta Beach, OR Coastal Erosion Rate
Is the coast eroding 2.8 miles north of Heceta Beach, OR?
2.8 miles north of Heceta Beach, OR: 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 Heceta Beach, OR. Centered near 44.06°N, 124.12°W. Survey years: 2002-2011, method LRR, from USGS's Pacific Northwest 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 43 individual transects averaged together, 0% of which measured erosion rather than growth. Uncertainty on this specific number: 2.49 ft/yr either side. Taken at face value, this segment's raw 0.7 ft/yr reading would land it 1063 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2012-1008. Inverness, CA sits at national rank 959 for growth (0.27 ft/yr), one reference point among the 1211 scored segments, 416 miles from here. 1.7 miles up the coast, Heceta Beach, OR shows the same lack of a significant trend.
Heceta Beach, OR on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.