Port O'Connor, TX Coastal Erosion Rate
What USGS measures 7.9 miles south of Port O'Connor, TX
Good news, and an honest one: USGS's data can't distinguish this stretch, 7.9 miles south of Port O'Connor, TX, from a flat trend. Whatever small movement it measured here is statistical noise, not a reliable direction, so none is claimed.
What "Port O'Connor" means on this page
USGS surveys the coast in transects spaced a few hundred feet apart; this page groups the nearest ones into a single ~3.5-mile reading for the stretch closest to Port O'Connor, TX, rather than showing one arbitrary line. Segment center: 28.34, -96.45. 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
106 transects feed this segment's number; 57% of them individually measured retreat. The published margin on this reading runs ±1.71 ft/yr. The unadjusted figure here, -0.46 ft/yr, would place it 311 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. Dunes City, OR sits at national rank 1058 for growth (0.67 ft/yr), one reference point among the 1211 scored segments, 1869 miles from here. Port O'Connor, TX, 1.7 miles off, is the adjacent measured stretch, itself no significant trend.
One address near Port O'Connor: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.