US Bridges

I0310 over I-10

Good

St. Charles Parish, Louisiana · 0.01 M North of I-10 WB · Structure no. 024504503600425

Built
1992
33 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
4,753 ft
68 main spans
Daily traffic
15,642
2021 count
Owner
State
State Highway Agency

About this bridge

I0310 over I-10 is a prestressed concrete continuous stringer/multi-beam or girder carrying I0310 over I-10 in St. Charles Parish, Louisiana. It was built in 1992, so it is 33 years old, younger 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 15,642 vehicles a day, roughly 25% of them trucks, projected to reach 17,206 by 2041. The structure is 4,753 ft (1,448.7 m) long and 43 ft wide.

CarriesI0310
CrossesI-10
Location0.01 M North of I-10 WB
RouteInterstate 310
Coordinates30.0069, -90.2842
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.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans68
Design loadHS 20
Structure length4,753 ft (1,448.7 m)
Longest span79 ft (24.1 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic15,642 (2021)
Projected traffic17,206 by 2041
Trucks25%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 I0310 over I-10 built?

It was built in 1992, making it 33 years old in 2025.

What condition is I0310 over I-10 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 September 2023.

How much traffic does I0310 over I-10 carry?

About 15,642 vehicles per day (2021 count), of which roughly 25% are trucks.

How long is I0310 over I-10?

The structure is 4,753 ft (1,448.7 m) long with a longest span of 79 ft (24.1 m) and a deck 43 ft wide.

Who owns I0310 over I-10?

It is owned by the State Highway Agency.