US Bridges

US0090 over Chacahoula Bayou

Good

Terrebonne Parish, Louisiana · 3.35 MI East of LA 662 · Structure no. 025504240703352

Built
1998
27 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
2,052 ft
27 main spans
Daily traffic
3,007
2021 count
Owner
State
State Highway Agency

About this bridge

US0090 over Chacahoula Bayou is a prestressed concrete stringer/multi-beam or girder carrying US0090 over Chacahoula Bayou in Terrebonne Parish, Louisiana. It was built in 1998, so it is 27 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 3,007 vehicles a day, roughly 18% of them trucks, projected to reach 3,307 by 2041. The structure is 2,052 ft (625.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS0090
CrossesChacahoula Bayou
Location3.35 MI East of LA 662
RouteU.S. Route 90
Coordinates29.68986, -90.9953
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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans27
Design loadHS 20
Structure length2,052 ft (625.4 m)
Longest span76 ft (23.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck26 ft (7.9 m)

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 closed1.2 mi (2 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 Chacahoula Bayou built?

It was built in 1998, making it 27 years old in 2025.

What condition is US0090 over Chacahoula Bayou 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 October 2023.

How much traffic does US0090 over Chacahoula Bayou carry?

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

How long is US0090 over Chacahoula Bayou?

The structure is 2,052 ft (625.4 m) long with a longest span of 76 ft (23.2 m) and a deck 43 ft wide.

Who owns US0090 over Chacahoula Bayou?

It is owned by the State Highway Agency.