US Bridges

I0010 over US 51 & Swamps

Good

St. John the Baptist Parish, Louisiana · I0010 · Structure no. 624804501312072

Built
1972
53 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
11,716 ft
177 main spans
Daily traffic
27,372
2021 count
Owner
State
State Highway Agency

About this bridge

I0010 over US 51 & Swamps is a prestressed concrete stringer/multi-beam or girder carrying I0010 over US 51 & Swamps in St. John the Baptist Parish, Louisiana. It was built in 1972, so it is 53 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 27,372 vehicles a day, roughly 26% of them trucks, projected to reach 30,109 by 2041. The structure is 11,716 ft (3,571 m) long and 44 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesI0010
CrossesUS 51 & Swamps
LocationI0010
RouteInterstate 10
Coordinates30.07959, -90.41
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans177 (+10 approach)
Design loadHS 20
Structure length11,716 ft (3,571 m)
Longest span83 ft (25.3 m)
Deck width44 ft (13.4 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,372 (2021)
Projected traffic30,109 by 2041
Trucks26%
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 I0010 over US 51 & Swamps built?

It was built in 1972, making it 53 years old in 2025.

What condition is I0010 over US 51 & Swamps 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 June 2023.

How much traffic does I0010 over US 51 & Swamps carry?

About 27,372 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is I0010 over US 51 & Swamps?

The structure is 11,716 ft (3,571 m) long with a longest span of 83 ft (25.3 m) and a deck 44 ft wide.

Who owns I0010 over US 51 & Swamps?

It is owned by the State Highway Agency.