US Bridges

US0090 over St. Louis Canal

Fair

Terrebonne Parish, Louisiana · 02554240718182 · Structure no. 025504240718182

Built
1981
44 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
125 ft
5 main spans
Daily traffic
11,661
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over St. Louis Canal is a concrete slab carrying US0090 over St. Louis Canal in Terrebonne Parish, Louisiana. It was built in 1981, so it is 44 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 11,661 vehicles a day, roughly 18% of them trucks, projected to reach 12,827 by 2041. The structure is 125 ft (38.1 m) long and 43 ft wide.

CarriesUS0090
CrossesSt. Louis Canal
Location02554240718182
RouteU.S. Route 90
Coordinates29.68197, -90.7598
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating32.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length125 ft (38.1 m)
Longest span25 ft (7.6 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,661 (2021)
Projected traffic12,827 by 2041
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US0090 over St. Louis Canal built?

It was built in 1981, making it 44 years old in 2025.

What condition is US0090 over St. Louis Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does US0090 over St. Louis Canal carry?

About 11,661 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is US0090 over St. Louis Canal?

The structure is 125 ft (38.1 m) long with a longest span of 25 ft (7.6 m) and a deck 43 ft wide.

Who owns US0090 over St. Louis Canal?

It is owned by the State Highway Agency.