4 votes

NS - Lake Pontchartrain Trestle


North End of trestle at Slidell

Photo taken by Nathan Morton in July 2010


BH Photo #169429

Street Views 


Arguably the longest railroad bridge in the United States


Bascule bridge over Lake Pontchartrain on Norfolk Southern Railway (former Southern Railway)
New Orleans, St. Tammany Parish, Louisiana, and Orleans Parish, Louisiana
Open to traffic
Originally built 1884. several upgrades have been made since
- Amtrak (AMTK)
- Norfolk Southern Railway (NS)
- Southern Railway (SOU)
Draw span: Bascule Warren through truss
Rest of bridge: Concrete stringers
Total length: 30,624.0 ft. (5.8 mi.)
Also called
Southern - Lake Pontchartrain Trestle
Norfolk Southern Lake Pontchartrain Bridge
Approximate latitude, longitude
+30.15913, -89.87189   (decimal degrees)
30°09'33" N, 89°52'19" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/223398/3339903 (zone/easting/northing)
Quadrangle map:
North Shore
Inventory number
BH 43746 (Bridgehunter.com ID)

Update Log 

  • June 16, 2017: New Street View added by Dana and Kay Klein
  • December 22, 2015: New photos from Douglas Butler
  • December 21, 2015: New Street View added by Douglas Butler
  • November 11, 2014: New Street View added by Douglas Butler
  • October 5, 2014: New photos from Royce and Bobette Haley
  • September 15, 2014: New photos from Douglas Butler
  • November 4, 2013: New Street View added by J.P.
  • July 8, 2010: New photos from Nathan Morton


  • Nathan Morton - morton890 [at] yahoo [dot] com
  • J.P. - wildcatjon2000 [at] gmail [dot] com
  • Patrick Feller - nakrnsm [at] aol [dot] com
  • Douglas Butler
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com
  • Dana and Kay Klein


NS - Lake Pontchartrain Trestle
Posted August 5, 2020, by Nathan Holth (webmaster [at] historicbridges [dot] org)

I am not sure when the bridge seen today was built but there is no way a massive concrete slab bridge on concrete bents dates to 1884. The main span is a bascule bridge that replaced a swing bridge. As near as I can tell 0% of this dates to 1884 and I would say it is incorrect to list the bridge as such. This video contains up close views of the approach spans leading to the bascule span. https://www.youtube.com/watch?time_continue=62&v=v8K6TdEuyOc...

NS - Lake Pontchartrain Trestle
Posted June 16, 2017, by Alan Walker (awalker1829 [at] yahoo [dot] com)

This bridge is the old New Orleans and North Eastern Railroad bridge. When it was originally constructed, it was unfilled. The bridge (as is) has had most of it's length filled. Originally, the total length of the bridge was approximately 21 miles in length (including approaches). Filling was completed in 1896, leaving the bridge as it is today.

NS - Lake Pontchartrain Trestle
Posted May 5, 2017, by Tony billiot (Y97not [at] hotmail [dot] com)

Will the bridge be open today for marine traffic

NS - Lake Pontchartrain Trestle
Posted April 3, 2015, by Buddy (robmsherf [at] yahoo [dot] com)

Is there a link for the anemometer(wind gauge) on the trestle, between MM 176 and 177.Sure could use that real time info for fishing the bridge. Thanks Buddy

NS - Lake Pontchartrain Trestle
Posted July 29, 2014, by Carl Drews (drews [at] ucar [dot] edu)

Thanks for the photo! I am creating a surge model of Lake Pontchartrain, and I needed to know whether the railway bridge is a causeway or up on piers. A causeway will block the water circulation, and piers will not. This bridge is up on piers, just like the two road bridges to the east (Highway 11 and Interstate 10).

Norfolk Southern Railway Lake Pontchartrain Trestle
Posted October 11, 2010, by Ed Hollowell (erhollowell [at] aol [dot] com)

It might be an oversight, or it might just be that it was fate that you would have the honor to "Add This Bridge".

Norfolk Southern Railway Lake Pontchartrain Trestle
Posted October 11, 2010, by George W. (glw4077 [at] gmail [dot] com)

Why is the CSX (former L&N) bridge over Rigolets Pass missing from this list? It is also arguably the longest through truss railroad bridge in North America, being over 4,500 feet in length.