Select Border Patrol Sector Corridor (Pacific to Gulf of Mexico)
Marker: 1,677 – 1,954 mi
Structural Engineering Cross-Section
30-ft Steel Bollard SystemHeight Above Grade
30 ft (9.1m)
Structural elevation
Concrete Footing
8-10 ft Deep
Anti-tunnel reinforced trench
Est. Cost / Mile
$24.8M / mi
Materials, road & sensors
Rio Grande Valley Sector Profile
HQ: Edinburg, TXSector Border Length
277 mi
100% River Boundary
Physical Barriers Built
86 mi
31% Coverage
Terrain Classification
Alluvial Floodplain
Rio Grande Riverbank
Barrier Composition
86 mi Fenced | 191 mi Unfenced River
Treaty & Legal Constraints: 1970 Boundary Treaty with Mexico prohibits barrier placement in main Rio Grande floodway that alters river flow. Requires IBWC binational permits; high proportion of private farmland condemnation.
Terrain Feasibility & Gaps
Alluvial soil requires slurry-wall concrete levee foundations. Barrier is built up to 1-2 miles inland from actual waterline to avoid Mexican territory and floodplain deflection.
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