US Bridges

LA1040 over I-55

Fair

Tangipahoa Parish, Louisiana · LA1040 · Structure no. 625308531003601

Built
1970
55 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
222 ft
4 main spans
Daily traffic
7,190
2021 count
Owner
State
State Highway Agency

About this bridge

LA1040 over I-55 is a prestressed concrete stringer/multi-beam or girder carrying LA1040 over I-55 in Tangipahoa Parish, Louisiana. It was built in 1970, so it is 55 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 7,190 vehicles a day, roughly 9% of them trucks, projected to reach 7,909 by 2041. The structure is 222 ft (67.7 m) long and 33 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesLA1040
CrossesI-55
LocationLA1040
RouteState Highway 1040
Coordinates30.49127, -90.4982
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating98 US tons
Inventory rating46 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length222 ft (67.7 m)
Longest span70 ft (21.3 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,190 (2021)
Projected traffic7,909 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed98.8 mi (159 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 LA1040 over I-55 built?

It was built in 1970, making it 55 years old in 2025.

What condition is LA1040 over I-55 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 February 2023.

How much traffic does LA1040 over I-55 carry?

About 7,190 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is LA1040 over I-55?

The structure is 222 ft (67.7 m) long with a longest span of 70 ft (21.3 m) and a deck 33 ft wide.

Who owns LA1040 over I-55?

It is owned by the State Highway Agency.