Port O'Connor, TX Coastal Erosion Rate
Is the coast eroding 8.8 miles east of Port O'Connor, TX?
Good news, and an honest one: USGS's data can't distinguish this stretch, 8.8 miles east 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: 28.48, -96.28. USGS's Gulf of Mexico assessment last surveyed this stretch through 2001, computing the rate with its LRR method. Other US regions were surveyed in different years, sometimes decades apart, so this page states its own rather than implying one national vintage.
How solid is this number
This reading comes from 26 individual transects averaged together, 0% of which measured erosion rather than growth. The published margin on this reading runs ±1.57 ft/yr. The unadjusted figure here, 0.41 ft/yr, would place it 998 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. San Buenaventura (Ventura), CA sits at national rank 1122 for growth (1.19 ft/yr), one reference point among the 1211 scored segments, 1410 miles from here. 1.9 miles up the coast, Port O'Connor, TX shows the same lack of a 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.