US Bridges

I0012 over I-10

Good

St. Tammany Parish, Louisiana · I0010 · Structure no. 625204540432681

Built
1970
55 years old
Condition
Good
inspected September 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
447 ft
5 main spans
Daily traffic
78,215
2021 count
Owner
State
State Highway Agency

About this bridge

I0012 over I-10 is a steel continuous girder and floorbeam system carrying I0012 over I-10 in St. Tammany Parish, Louisiana. It was built in 1970, so it is 55 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 78,215 vehicles a day, roughly 26% of them trucks, projected to reach 86,036 by 2041. The structure is 447 ft (136.2 m) long and 31 ft wide.

CarriesI0012
CrossesI-10
LocationI0010
RouteInterstate 12
Coordinates30.30479, -89.7375
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.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating44 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length447 ft (136.2 m)
Longest span99 ft (30.2 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic78,215 (2021)
Projected traffic86,036 by 2041
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
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 I0012 over I-10 built?

It was built in 1970, making it 55 years old in 2025.

What condition is I0012 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 I0012 over I-10 carry?

About 78,215 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is I0012 over I-10?

The structure is 447 ft (136.2 m) long with a longest span of 99 ft (30.2 m) and a deck 31 ft wide.

Who owns I0012 over I-10?

It is owned by the State Highway Agency.