IHNC Lake Borgne Surge Barrier

The IHNC Lake Borgne Surge Barrier is a large flood control structure spanning the Gulf Intracoastal Waterway and Mississippi River Gulf Outlet near New Orleans. It uses a wide sector gate and a vertical lift gate to allow ships to pass through while blocking dangerous surge from storms.

After Hurricane Katrina struck in 2005, the U.S. Army Corps of Engineers built this barrier as part of a broader system to defend against hurricanes and storm damage. The project represented a major shift in how the region prepared for future disasters.

Locals call this the Great Wall of Louisiana, reflecting how deeply the structure has become part of the community's identity and its determination to safeguard against water. The nickname shows how the barrier represents more than just engineering—it embodies resilience and protection.

The barrier can be seen from nearby roads and observation areas along the waterways surrounding it. Keep in mind that this is an active flood control facility, so access to certain areas may be limited for safety reasons.

The structure rests on more than a thousand massive concrete pilings driven deep into the seabed, giving it exceptional stability. This engineering solution makes it one of the most robust flood barriers of its kind in North America.

Location: Louisiana

GPS coordinates: 30.00560,-89.90140

Latest update: December 7, 2025 19:24