US Bridges

I0055 over Elevated Rdwy

Fair

Tangipahoa Parish, Louisiana · 11.0 M S of LA 22 · Structure no. 625304529000581

Built
1979
46 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
42,125 ft
607 main spans
Daily traffic
39,850
2021 count
Owner
State
State Highway Agency

About this bridge

I0055 over Elevated Rdwy is a prestressed concrete stringer/multi-beam or girder carrying I0055 over Elevated Rdwy in Tangipahoa Parish, Louisiana. It was built in 1979, so it is 46 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 39,850 vehicles a day, roughly 25% of them trucks, projected to reach 43,835 by 2041. The structure is 42,125 ft (12,839.7 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesI0055
CrossesElevated Rdwy
Location11.0 M S of LA 22
RouteInterstate 55
CountyTangipahoa Parish
StateLouisiana
Coordinates30.2895, -90.40261
Functional classRural Principal Arterial - Interstate

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 protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans607
Design loadHS 20
Structure length42,125 ft (12,839.7 m)
Longest span70 ft (21.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39,850 (2021)
Projected traffic43,835 by 2041
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed98.8 mi (159 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I0055 over Elevated Rdwy built?

It was built in 1979, making it 46 years old in 2025.

What condition is I0055 over Elevated Rdwy 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 I0055 over Elevated Rdwy carry?

About 39,850 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0055 over Elevated Rdwy?

The structure is 42,125 ft (12,839.7 m) long with a longest span of 70 ft (21.3 m) and a deck 43 ft wide.

Who owns I0055 over Elevated Rdwy?

It is owned by the State Highway Agency.