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Morganza Spillway US 190 Bridge


Street View 


Flood of 2011 in Lousiana. The Morganza Spillway at Hwy 190 Four Mile Bridge

99% of the time it's dry land under the bridge. However, about every 40 years during a big flood on the Mississippi, they open up the Morganza.

Video posted by Jared Mixson

Play video on YouTube


Concrete tee beam bridge over Morganza Spillway on US 190
Pointe Coupee Parish, Louisiana
Open to traffic
Built 1945
- Forcum-James Co. of Dyersburg, Tennessee (approaches)
458 reinforced concrete deck girder spans (each 41' long) supported on reinforced concrete bents. Earthen approaches.
Length of largest span: 41.0 ft.
Total length: 18,778.8 ft. (3.6 mi.)
Deck width: 47.9 ft.
Also called
Four Mile Bridge
Morganza Floodway Bridge
Approximate latitude, longitude
+30.55462, -91.68789   (decimal degrees)
30°33'17" N, 91°41'16" W   (degrees°minutes'seconds")
Approximate UTM coordinates
15/625846/3380977 (zone/easting/northing)
Quadrangle map:
Average daily traffic (as of 2016)
Inventory number
BH 53619 (Bridgehunter.com ID)
Inspection report (as of November 2017)
Overall condition: Fair
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Deck condition rating: Satisfactory (6 out of 9)
Sufficiency rating: 74.4 (out of 100)
View more at BridgeReports.com

Update Log 

  • October 21, 2021: Updated by Cliff Darby: Added category "Fence guardrail"
  • August 19, 2021: New photos from James McCray
  • May 30, 2013: New photos from M. D. Caillet
  • September 24, 2012: Added by Jared Mixson


  • Jared
  • James McCray - jamesinslocomb [at] yahoo [dot] com


Morganza Floodway Bridge
Posted December 16, 2018, by Charles mayne (cjmayne [at] live [dot] com)

The La Dept of Highways built the bridge (I believe). My father,Paul J Mayne, was one of the civil engineers in charge of the work. We would drive over it and he was very proud of how level the concrete supports were after so many years in a swamp.

Funny story, my mother used to bring him lunch occasionally and on e she noticed a framed sawing off a board upon which he was sitting. But he was sitting on the part of the board that would fall into the water. My mom said “Paul , you going to let that man saw himself off into the water?” He said “ Yeah, he won’t do it again!”

Morganza Floodway Bridge
Posted April 23, 2015, by Lesa Brose (lesabrose [at] yahoo [dot] com )

Does anyone know who the builder of this bridge was? I believe my grandfather worked on this bridge during the 1940's. The construction company owners last name may have been Walker? Thanks.