US Bridges

US0090 over LA 83 S.P. RR

Good

St. Mary Parish, Louisiana · 3.2 MI NW of LA 3211 · Structure no. 035104240507412

Built
1978
47 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,544 ft
22 main spans
Daily traffic
10,070
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over LA 83 S.P. RR is a prestressed concrete stringer/multi-beam or girder carrying US0090 over LA 83 S.P. RR in St. Mary Parish, Louisiana. It was built in 1978, so it is 47 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 10,070 vehicles a day, roughly 14% of them trucks, projected to reach 11,077 by 2041. The structure is 1,544 ft (470.6 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS0090
CrossesLA 83 S.P. RR
Location3.2 MI NW of LA 3211
RouteU.S. Route 90
Coordinates29.83301, -91.56301
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans22
Design loadHS 20
Structure length1,544 ft (470.6 m)
Longest span95 ft (29 m)
Deck width55 ft (16.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,070 (2021)
Projected traffic11,077 by 2041
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
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 83 S.P. RR built?

It was built in 1978, making it 47 years old in 2025.

What condition is US0090 over LA 83 S.P. RR 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 March 2024.

How much traffic does US0090 over LA 83 S.P. RR carry?

About 10,070 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is US0090 over LA 83 S.P. RR?

The structure is 1,544 ft (470.6 m) long with a longest span of 95 ft (29 m) and a deck 55 ft wide.

Who owns US0090 over LA 83 S.P. RR?

It is owned by the State Highway Agency.