US Bridges

US0090 over 6th

Good

St. Mary Parish, Louisiana · 1.4 MI W of LA 182/LA 70 · Structure no. 035104240532328

Built
1977
48 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
542 ft
7 main spans
Daily traffic
2,163
2020 count
Owner
State
State Highway Agency

About this bridge

US0090 over 6th is a prestressed concrete stringer/multi-beam or girder carrying US0090 over 6th in St. Mary Parish, Louisiana. It was built in 1977, so it is 48 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 2,163 vehicles a day, roughly 14% of them trucks, projected to reach 2,379 by 2040. The structure is 542 ft (165.2 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0090
Crosses6th
Location1.4 MI W of LA 182/LA 70
RouteU.S. Route 90
CountySt. Mary Parish
StateLouisiana
Coordinates29.6931, -91.22081
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length542 ft (165.2 m)
Longest span81 ft (24.7 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,163 (2020)
Projected traffic2,379 by 2040
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US0090 over 6th built?

It was built in 1977, making it 48 years old in 2025.

What condition is US0090 over 6th 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 6th carry?

About 2,163 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is US0090 over 6th?

The structure is 542 ft (165.2 m) long with a longest span of 81 ft (24.7 m) and a deck 28 ft wide.

Who owns US0090 over 6th?

It is owned by the State Highway Agency.