Lamar, TX Coastal Erosion Rate
What USGS measures 8.5 miles southeast of Lamar, TX
Nothing alarming measured 8.5 miles southeast of Lamar, TX: whatever shift USGS's transects picked up here is too small to call reliably one way or the other, which this site reports as "no significant trend" rather than forcing a direction.
The grain of this number
Lamar, TX is the nearest named place, 8.5 miles away, to a ~3.5-mile stretch of coast USGS has surveyed - the reading below covers that whole stretch, not a single property in it. Segment center: 28.07, -96.87. The survey behind it runs to 2001, in USGS's Gulf of Mexico 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
11 transects feed this segment's number; 27% of them individually measured retreat. Uncertainty on this specific number: 0.38 ft/yr either side. The unadjusted figure here, 0.26 ft/yr, would place it 948 of 1211 if ranked directly - but an unreliable rank isn't a useful one, which is exactly why "no significant trend" is the headline instead. Source: USGS Open-File Report 2004-1089. Rank 1158 nationally for growth belongs to Coronado, CA, 1251 miles from this stretch, measured at 2.04 ft/yr. Lamar, TX, 2.3 miles off, is the adjacent measured stretch, itself no significant trend.
Not this whole stretch, just Lamar itself: the Coastal Change Hazards Portal is USGS's own live version of this data.