US Bridges

US0090 over Drainage Canals LA.20 RR

Fair

Terrebonne Parish, Louisiana · .5 MI East of LA 311 · Structure no. 025504240708362

Built
1995
30 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
29,544 ft
423 main spans
Daily traffic
3,007
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over Drainage Canals LA.20 RR is a prestressed concrete continuous stringer/multi-beam or girder carrying US0090 over Drainage Canals LA.20 RR 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 3,007 vehicles a day, roughly 18% of them trucks, projected to reach 3,307 by 2041. The structure is 29,544 ft (9,005 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUS0090
CrossesDrainage Canals LA.20 RR
Location.5 MI East of LA 311
RouteU.S. Route 90
CountyTerrebonne Parish
StateLouisiana
Coordinates29.68342, -90.8275
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans423 (+7 approach)
Design loadHS 20
Structure length29,544 ft (9,005 m)
Longest span95 ft (29 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,007 (2021)
Projected traffic3,307 by 2041
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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 Drainage Canals LA.20 RR built?

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

What condition is US0090 over Drainage Canals LA.20 RR 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 October 2023.

How much traffic does US0090 over Drainage Canals LA.20 RR carry?

About 3,007 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is US0090 over Drainage Canals LA.20 RR?

The structure is 29,544 ft (9,005 m) long with a longest span of 95 ft (29 m) and a deck 43 ft wide.

Who owns US0090 over Drainage Canals LA.20 RR?

It is owned by the State Highway Agency.