Dulac, LA Coastal Erosion Rate
What USGS measures 25.3 miles south of Dulac, LA
The coast 25.3 miles south of Dulac, LA has been retreating at a measured 13.82 feet a year, USGS's own long-term rate for this stretch, built from historical shoreline positions rather than a single survey. At that rate, the shoreline has lost roughly 138.2 feet over the last decade.
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 Dulac, LA. Centered near 29.06°N, 90.84°W. Survey years: 2001, method LRR, from USGS's Gulf of Mexico 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.
25 years at this rate
If 13.82 ft/yr holds for the next 25 years, the coast 25.3 miles south of Dulac, LA would retreat roughly 346 more feet, a projection, not a certainty: erosion rates shift with storms, sediment supply and any armoring built in the meantime.
Where this fits nationally
This reading comes from 33 individual transects averaged together, 100% of which measured erosion rather than growth. USGS's confidence interval here is ±0.86 ft/yr. This segment ranks 14 of 1211 measured US coastal segments, ordered from fastest erosion to fastest growth. Source: USGS Open-File Report 2004-1089. Carmel-by-the-Sea, CA sits at national rank 239 for erosion (0.72 ft/yr), one reference point among the 1211 scored segments, 1869 miles from here. 1.4 miles away, Dulac, LA is the nearest other measured stretch: severe erosion at 14.91 ft/yr.
One address near Dulac: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.