US Bridges

I0055 over Ponchatoula Cr.

Good

Tangipahoa Parish, Louisiana · I0055 · Structure no. 625304529013202

Built
1960
65 years old, rebuilt 1989
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
242 ft
6 main spans
Daily traffic
21,736
2021 count
Owner
State
State Highway Agency

About this bridge

I0055 over Ponchatoula Cr. is a steel stringer/multi-beam or girder carrying I0055 over Ponchatoula Cr. in Tangipahoa Parish, Louisiana. It was built in 1960 and reconstructed in 1989, so it is 65 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 21,736 vehicles a day, roughly 26% of them trucks, projected to reach 23,909 by 2041. The structure is 242 ft (73.8 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI0055
CrossesPonchatoula Cr.
LocationI0055
RouteInterstate 55
CountyTangipahoa Parish
StateLouisiana
Coordinates30.45538, -90.4726
Functional classUrban Principal Arterial - Interstate

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length242 ft (73.8 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,736 (2021)
Projected traffic23,909 by 2041
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I0055 over Ponchatoula Cr. built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1989.

What condition is I0055 over Ponchatoula Cr. 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 January 2025.

How much traffic does I0055 over Ponchatoula Cr. carry?

About 21,736 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is I0055 over Ponchatoula Cr.?

The structure is 242 ft (73.8 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns I0055 over Ponchatoula Cr.?

It is owned by the State Highway Agency.