US Bridges

US0090 over Swamp

Fair

Terrebonne Parish, Louisiana · .1 Mi.From LA.20 · Structure no. 025504240709117

Built
1995
30 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
634 ft
12 main spans
Daily traffic
2,629
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over Swamp is a prestressed concrete stringer/multi-beam or girder carrying US0090 over Swamp in Terrebonne Parish, Louisiana. It was built in 1995, so it is 30 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,629 vehicles a day, roughly 18% of them trucks, projected to reach 2,891 by 2041. The structure is 634 ft (193.2 m) long and 34 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS0090
CrossesSwamp
Location.1 Mi.From LA.20
RouteU.S. Route 90
CountyTerrebonne Parish
StateLouisiana
Coordinates29.70704, -90.9025
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating51.5 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans12
Design loadHS 20
Structure length634 ft (193.2 m)
Longest span70 ft (21.3 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,629 (2021)
Projected traffic2,891 by 2041
Trucks18%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US0090 over Swamp built?

It was built in 1995, making it 30 years old in 2025.

What condition is US0090 over Swamp in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does US0090 over Swamp carry?

About 2,629 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is US0090 over Swamp?

The structure is 634 ft (193.2 m) long with a longest span of 70 ft (21.3 m) and a deck 34 ft wide.

Who owns US0090 over Swamp?

It is owned by the State Highway Agency.