US Bridges

LA0040 over Tangipahoa River

FairPosted for load

Tangipahoa Parish, Louisiana · 1.3 Miles East of US 51 · Structure no. 625304150301331

Built
1965
60 years old
Condition
Fair
inspected December 2024
Type
Girder and Floorbeam System
Steel
Length
610 ft
1 main span
Daily traffic
4,748
2021 count
Owner
State
State Highway Agency

About this bridge

LA0040 over Tangipahoa River is a steel girder and floorbeam system carrying LA0040 over Tangipahoa River in Tangipahoa Parish, Louisiana. It was built in 1965, so it is 60 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. Its operating status is: posted for load restriction.

It carries about 4,748 vehicles a day, roughly 12% of them trucks, projected to reach 5,222 by 2041. The structure is 610 ft (185.9 m) long and 30 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesLA0040
CrossesTangipahoa River
Location1.3 Miles East of US 51
RouteState Highway 40
CountyTangipahoa Parish
StateLouisiana
Coordinates30.63693, -90.4804
Functional classRural Major 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 15
Structure length610 ft (185.9 m)
Longest span350 ft (106.7 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,748 (2021)
Projected traffic5,222 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0040 over Tangipahoa River built?

It was built in 1965, making it 60 years old in 2025.

What condition is LA0040 over Tangipahoa River 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 December 2024.

How much traffic does LA0040 over Tangipahoa River carry?

About 4,748 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0040 over Tangipahoa River?

The structure is 610 ft (185.9 m) long with a longest span of 350 ft (106.7 m) and a deck 30 ft wide.

Who owns LA0040 over Tangipahoa River?

It is owned by the State Highway Agency.