US Bridges

US0090 over LA 318

Good

St. Mary Parish, Louisiana · 3.1 MI E of LA 668 · Structure no. 035100000030508

Built
2017
8 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
1,887 ft
17 main spans
Daily traffic
8,073
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over LA 318 is a concrete continuous stringer/multi-beam or girder carrying US0090 over LA 318 in St. Mary Parish, Louisiana. It was built in 2017, so it is 8 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,073 vehicles a day, roughly 24% of them trucks, projected to reach 8,880 by 2041. The structure is 1,887 ft (575.2 m) long and 45 ft wide.

CarriesUS0090
CrossesLA 318
Location3.1 MI E of LA 668
RouteU.S. Route 90
Coordinates29.86771, -91.63622
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.7 US tons
Inventory rating50.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans17
Design loadGreater than HL 93
Structure length1,887 ft (575.2 m)
Longest span111 ft (33.8 m)
Deck width45 ft (13.6 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,073 (2021)
Projected traffic8,880 by 2041
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 US0090 over LA 318 built?

It was built in 2017, making it 8 years old in 2025.

What condition is US0090 over LA 318 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 August 2023.

How much traffic does US0090 over LA 318 carry?

About 8,073 vehicles per day (2021 count), of which roughly 24% are trucks.

How long is US0090 over LA 318?

The structure is 1,887 ft (575.2 m) long with a longest span of 111 ft (33.8 m) and a deck 45 ft wide.

Who owns US0090 over LA 318?

It is owned by the State Highway Agency.