Port O'Connor, TX Coastal Erosion Rate
Shoreline change 6.3 miles south of Port O'Connor, TX
The coast 6.3 miles south of Port O'Connor, TX shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
What "Port O'Connor" means on this page
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Port O'Connor, TX into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 28.35°N, 96.41°W. 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
This reading comes from 112 individual transects averaged together, 76% of which measured erosion rather than growth. Uncertainty on this specific number: 7.92 ft/yr either side. Taken at face value, this segment's raw -5.85 ft/yr reading would land it 44 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2004-1089. Santa Monica, CA sits at national rank 932 for growth (0.21 ft/yr), one reference point among the 1211 scored segments, 1363 miles from here. Port O'Connor, TX, 2.5 miles off, is the adjacent measured stretch, itself no significant trend.
Port O'Connor, TX on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.