Huey P. Long Bridge (New Orleans)

From the east-bank levee just south of Jefferson Highway, observers stand roughly 300 feet from the rail viaduct approach, watching NOPB locomotives bring trains down to the bridge at restricted speed before attacking the 1.25% grade onto the main span. Trains slow noticeably on the climb—ideal for reading car numbers and identifying locomotive consists. Expect wheel squeal on the curve at the Elmwood end and a deep exhaust note as GEVOs and SD70AHs dig in. The bridge sees an average of 110 trains per week (roughly 15–16 per day), with traffic from UP, BNSF, CN, CSX, Norfolk Southern, and CPKC all moving under NOPB trackage. The west-bank levee at Bridge City provides an equally valid vantage; the river-crossing is oriented roughly northwest-southeast, so morning light favors the east bank and afternoon/evening light favors the west. NOPB maintenance crews work four days a week on the structure, so daytime visits may include slow-order local moves in addition to Class I runs.

The bridge spans the Mississippi at a point where the river runs wide, slow, and brown, flanked by grain elevators, container terminals, and tank farms on both banks. The 790-foot main span clears river navigation by 153 feet, dwarfing the towboats and barge tows that pass beneath. From the low east-bank levee (elevation roughly 10–15 feet above mean sea level), the truss work rises 135 feet above the water, dominating the western horizon. Pelicans and egrets are common on the river edge. New Orleans' semi-tropical climate means high humidity year-round; Gulf breezes provide relief in summer. Winter cold fronts (October–March) bring brief dry spells with excellent atmospheric clarity—prime photography conditions. The levee grass and nearby oak canopy make the site feel surprisingly quiet between trains despite the industrial setting.

The New Orleans Public Belt Railroad (NOPB) owns and dispatches all rail traffic across the bridge, handling interchange for six Class I railroads. Union Pacific sends daily grain, petrochemical tank, and mixed-manifest trains; BNSF has daily interchange seven days a week. CN interchanges twice daily (carload and intermodal), and CPKC runs six days per week with three moves on Thursdays. CSX and Norfolk Southern complete the set. Typical consists include UP and BNSF intermodal double-stacks, unit grain trains (corn, soybeans, rice), and petrochemical tank cars bound for refineries on the west bank. In 2019 alone, nearly 500,000 rail cars crossed the bridge. Train lengths frequently exceed 6,000 feet. No Amtrak or passenger trains use the bridge—Amtrak's Sunset Limited and City of New Orleans operate via other routes into Union Passenger Terminal.

East-bank levee south of Jefferson Highway: morning light illuminates the east-facing truss; position at the point where the rail viaduct curves toward the main span to capture the full truss silhouette with the river in the background. Use 200–400mm for locomotive close-ups on the approach. West-bank levee near Bridge City: afternoon and sunset light, with the New Orleans skyline faintly visible downstream. The old Ochsner Medical Center parking garage (east bank, ~0.5 mi upriver) offers an elevated 3–4 story vantage above the levee, allowing a downward view of trains on the viaduct approach—popular with local photographers. The bridge is flat (no hump) by design to accommodate rail grade limits, so trains appear level rather than cresting a hill, giving unobstructed side profiles along the entire visible approach.

Opened December 16, 1935, the Huey P. Long Bridge was the first Mississippi River crossing in Louisiana and the longest high-level railroad bridge in the world at the time—22,996 feet of steel trestle. Designed by Polish-American engineer Ralph Modjeski (also responsible for the Benjamin Franklin Bridge in Philadelphia and the Harahan Bridge in Memphis), the structure cost $12.8 million and was financed through a 1932 agreement among Southern Pacific Railroad, the City of New Orleans, and the State of Louisiana. Before the bridge opened, rail cars were ferried across the river on barges—a slow and capacity-limited operation. The bridge was named for Governor Huey P. Long three months after his assassination in the State Capitol (September 8, 1935). An estimated one-third of all U.S. east-west rail freight crosses the Mississippi on this bridge. A $1.2 billion highway-widening project, completed July 2013, expanded the road lanes from four to six but left the double-track rail unchanged. The bridge is a designated National Historic Civil Engineering Landmark (ASCE).

The Huey P. Long Bridge is the only dual-use rail-highway bridge remaining in active service on the lower Mississippi River, and the only place in the New Orleans metro area where observers can watch heavy freight from six Class I railroads negotiate a 1.25% river-crossing grade. The NOPB still fabricates all 34,704 wooden rail ties on a dedicated on-site sawmill using Southern Yellow Pine—an anachronistic detail rarely found on modern infrastructure. The Cooper E90 design rating, higher than the industry standard of E72–E80, allows unusually heavy single-car loads of up to one million pounds in restricted service. No admission fee, no permit required: the Mississippi River levee is public land open 24 hours.