Exploring the Five Longest Bridges in the United States

Photo bygetty images

The United States is home to some of the most impressive and expansive bridges in the world. These architectural marvels not only serve as crucial transportation links but also stand as symbols of engineering prowess. Here, we explore the five longest bridges in the USA, highlighting their unique features and historical significance.

1. Lake Pontchartrain Causeway, Louisiana

Topping the list is the Lake Pontchartrain Causeway, an astonishing 23.88-mile bridge that stretches across Lake Pontchartrain in Louisiana. Recognized as the longest continuous over-water highway bridge in the world, this structure consists of two parallel bridges that connect the cities of Metairie and Mandeville. Completed in the 1960s, the Causeway supports more than 40,000 vehicles daily, making it a vital artery for the region​​.

2. Manchac Swamp Bridge, Louisiana

Located just a short drive from the Causeway, the Manchac Swamp Bridge ranks as the second-longest bridge in the U.S., extending 22.80 miles. This twin trestle bridge carries Interstate 55 over the Manchac Swamp, an area steeped in local legends and lore. Built in 1979, the bridge is not only a critical transportation route but also a unique driving experience as it hovers above the mysterious swamp below​.

3. Atchafalaya Basin Bridge, Louisiana

The Atchafalaya Basin Bridge, also known as the Louisiana Airborne Memorial Bridge, spans 18.2 miles across the largest wetland in the United States, the Atchafalaya Basin. This pair of parallel bridges carries Interstate 10 between Baton Rouge and Lafayette. Constructed in the early 1970s, the bridge is notorious for its narrow shoulders and frequent accidents, yet it remains an essential connector for the state​​.

4. Chesapeake Bay Bridge-Tunnel, Virginia

The Chesapeake Bay Bridge-Tunnel is a unique engineering marvel that combines a bridge and a tunnel to span 17.6 miles across the mouth of the Chesapeake Bay. Opened in 1964, this structure links Virginia Beach with Virginia’s Eastern Shore and has been recognized as one of the Seven Engineering Wonders of the Modern World. The bridge-tunnel provides a dramatic journey over and under the water, offering scenic views along its route​​.

5. Bonnet Carré Spillway Bridge, Louisiana

Rounding out the list is the Bonnet Carré Spillway Bridge, which spans 11 miles over the Bonnet Carré Spillway, Lake Pontchartrain, and LaBranche Wetlands. Built in the early 1970s, this bridge is part of the flood control system that protects New Orleans from Mississippi River floods. Its role in regional infrastructure is critical, serving as a key route for Interstate 10​​.

The Engineering Feats Behind America’s Longest Bridges

These bridges are not just long stretches of concrete and steel; they are vital links that keep the nation connected, whether traversing vast bodies of water, swamps, or wetlands. Each bridge tells a story of human ingenuity, resilience, and the relentless pursuit of connecting communities, no matter the geographical challenges.

Sources:

• Largest.org
• Journeyz.co
• Flavorverse.com
• USABynumbers.com