US Bridges

Michaud ST over I-49

Good

Lafayette Parish, Louisiana · .15 MI SW of LA1252 · Structure no. 032804550105331

Built
1980
45 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
418 ft
4 main spans
Daily traffic
43,200
2015 count
Owner
State
State Highway Agency

About this bridge

Michaud ST over I-49 is a prestressed concrete continuous stringer/multi-beam or girder carrying Michaud ST over I-49 in Lafayette Parish, Louisiana. It was built in 1980, so it is 45 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 43,200 vehicles a day, roughly 6% of them trucks, projected to reach 47,520 by 2035. The structure is 418 ft (127.4 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMichaud ST
CrossesI-49
Location.15 MI SW of LA1252
RouteCounty Highway 0
Coordinates30.33664, -92.03949
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length418 ft (127.4 m)
Longest span105 ft (32 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,200 (2015)
Projected traffic47,520 by 2035
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Michaud ST over I-49 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Michaud ST over I-49 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does Michaud ST over I-49 carry?

About 43,200 vehicles per day (2015 count), of which roughly 6% are trucks.

How long is Michaud ST over I-49?

The structure is 418 ft (127.4 m) long with a longest span of 105 ft (32 m) and a deck 33 ft wide.

Who owns Michaud ST over I-49?

It is owned by the State Highway Agency.