US Bridges

Mirabeau Ave over Bayou St. John

Fair

Orleans Parish, Louisiana · 0.1 MI E of Wisner Blvd. · Structure no. 023630004900511

Built
2004
21 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
133 ft
7 main spans
Daily traffic
—
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mirabeau Ave over Bayou St. John is a concrete slab carrying Mirabeau Ave over Bayou St. John in Orleans Parish, Louisiana. It was built in 2004, so it is 21 years old, younger 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.

No traffic count is recorded. The structure is 133 ft (40.5 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMirabeau Ave
CrossesBayou St. John
Location0.1 MI E of Wisner Blvd.
RouteCity Street 0
CountyOrleans Parish
StateLouisiana
Coordinates30.00663, -90.08551
Functional classUrban Minor Arterial

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.1 US tons
Inventory rating35.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span19 ft (5.8 m)
Deck width70 ft (21.3 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks—
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mirabeau Ave over Bayou St. John built?

It was built in 2004, making it 21 years old in 2025.

What condition is Mirabeau Ave over Bayou St. John 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 May 2023.

How much traffic does Mirabeau Ave over Bayou St. John carry?

No traffic count is recorded for this structure.

How long is Mirabeau Ave over Bayou St. John?

The structure is 133 ft (40.5 m) long with a longest span of 19 ft (5.8 m) and a deck 70 ft wide.

Who owns Mirabeau Ave over Bayou St. John?

It is owned by the City or Municipal Highway Agency.