14 votes

Lake Pontchartrain Causeway


Driving northbound

Photo taken by James Baughn

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BH Photo #103406


Street View 


Pair of prestressed concrete bridges over Lake Pontchartrain with a length of nearly 24 miles
New Orleans, St. Tammany Parish, Louisiana, and Jefferson Parish, Louisiana
Open to two lanes of toll southbound traffic and two lanes of free northbound traffic
First bridge built 1956
Length of largest span: 180.1 ft.
Total length: 126,061.3 ft. (23.9 mi.)
Deck width: 27.9 ft.
Approximate latitude, longitude
+30.19610, -90.12332   (decimal degrees)
30°11'46" N, 90°07'24" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/776959/3344014 (zone/easting/northing)
Quadrangle map:
Spanish Fort NE
Average daily traffic (as of 1987)
Inventory number
BH 19135 (Bridgehunter.com ID)
Inspection report (as of October 2017)
Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Good (7 out of 9)
Sufficiency rating: 59.7 (out of 100)
View more at BridgeReports.com

Update Log 

  • June 13, 2017: New photos from John Christeson
  • May 28, 2010: New Street View added by Craig Philpott



Lake Pontchartrain Causeway
Posted November 8, 2013, by Nathan Holth (form3 [at] historicbridges [dot] org)

This bridge is now a National Historic Civil Engineering Landmark.


Lake Pontchartrain Causeway
Posted April 10, 2013, by Samantha (samwalker97 [at] hotmail [dot] com)

Here's a video on how they kinda made it.


Lake Pontchartrain Causeway
Posted September 10, 2010, by Nathan Holth (form3 [at] historicbridges [dot] org)

Kathy: 125,795 feet (total length of bridge) = 23.8 miles.

Lake Pontchartrain Causeway
Posted September 10, 2010, by Kathy Newton (knewton [at] chnola [dot] org)

How many miles long is the bridge?

Lake Pontchartrain Causeway
Posted February 28, 2008, by Jacki Drewett

Having been born and raised in Metaire, LA, as a child, 7 yrs. old. I can remember just waiting for "The Causeway" to open. On a Sunday "outing", the family packed into the car for our first crossing. What a wonderful memory. When we got to the Northshore, we turned around and headed for home. Pls realize that at that time Mandeville was almost non-existant, and Covington was just a speck on the map.

When the second span was opened, now having a driver's license, I was one of the first to cross. Oh, how the memories flood back (no pun intended). Just a penny for every time I made the crossing!

What brought this on, I received an e-mail that claimed that the Donghai Bridge in China is the longest bridge in the world at 32.5km (20.19 mi.---if my conversion factor is correct). That leaves it approx. 3 miles short of our beloved bridges.

Lake Pontchartrain Causeway
Posted December 5, 2007, by Delaney Hand (delaneythehorsegirl [at] yahoo [dot] com)

I cross this bridge northbound and southbound every Wednesday and Saturday for my horseback riding lesson. It is an engineering marvel!! I have crossed so many times it seems like it takes no time at all to get across to me. If it's your first couple of times traveling across it it seems long.

Lake Pontchartrain Causeway
Posted November 26, 2007, by Brian (brichoux [at] hotmail [dot] com)

I live in Baton Rouge so we never take this route. But I am proud to have the worlds longest bride in my state.

Lake Pontchartrain Causeway
Posted June 13, 2007, by Gandhy

It's great, I was in New Orleans but I don't have a expirience traveling across this bridge, I think is so borred,water at both sides, but this thing made me think in how great can be the humans.

Lake Pontchartrain Causeway
Posted August 31, 2006, by alexus (pinkprettypawprint [at] yahoo [dot] com)

How do u build this bridge

Lake Pontchartrain Causeway
Posted August 31, 2006, by alexus (pinkprettypawprint [at] yahoo [dot] com)

How do u build thsi bridge

Lake Pontchartrain Causeway
Posted May 16, 2006, by Steve Carras (gcarras [at] aol [dot] com)

We traveled across that bridge northbound in 1995. As far as current bridge(s!) go legnthwise, this one takes the proverbial cake. There are five nacvigation humps (cue that overplayed but still very catchy "Black Eyed Peas" song hit): going northbound as did we (my parents and I):

a) nad b) two small fixed prestressed-concrete spans, a larger hump, anotbher smaller "hump",and then the drawbruidge that si pciutred above several times.

Glad to have found this site.

Lake Pontchartrain Causeway
Posted March 16, 2006, by Kendra Miller

This bridge is sweet! :)<---(this was supposed to be a smilly face) how long did it take y'all, and how ya do it? It makes me wonder where we got the tecnology, time, and material to do things like this. Anyways, I'll find time later to wonder. This is Kendra Miller from Amarillo Texas wishing New Orleans luck. I wish my group had more time than we did to help y'all out. Bye.

Lake Pontchartrain Causeway
Posted March 15, 2006, by Kendra Miller

The only thing i wonder about the Causeway Bridge is how long did it take to build it and how'd y'all do it?

Lake Pontchartrain Causeway
Posted September 13, 2005, by janey (crazyjaney16 [at] msn [dot] com)

The Twin Spans (I-10 connecting Slidell to New Orleans East) has been totally destroyed. Huge sections missing; the westbound lane now looks like a huge dotted line.

Lake Pontchartrain Causeway
Posted September 3, 2005, by Rush Wickes

The southbound span of the Causeway suffered some damage at the connection to south shore. This is in the process of being repaired quickly. The northbound span of the Causeway is undamaged however, carrying emergency traffic only in both directions.

Lake Pontchartrain Causeway
Posted August 31, 2005, by James Baughn (bridges [at] midwestplaces [dot] com)

From what I can gather, this bridge has suffered some damage from Hurricane Katrina, but not nearly as extensive as the I-10 bridge over Lake Pontchartrain east of New Orleans. If anybody has more information, please post a comment here.