US Bridges

Morgan ST over Terrebonne Bayou

FairPosted for load

Terrebonne Parish, Louisiana · 0.01 MI S of LA 24 · Structure no. 025529359904381

Built
2003
22 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
3,837
2022 count
Owner
County
County Highway Agency

About this bridge

Morgan ST over Terrebonne Bayou is a concrete slab carrying Morgan ST over Terrebonne Bayou in Terrebonne Parish, Louisiana. It was built in 2003, so it is 22 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 3,837 vehicles a day, projected to reach 4,220 by 2042. The structure is 76 ft (23.2 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMorgan ST
CrossesTerrebonne Bayou
Location0.01 MI S of LA 24
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.59822, -90.72975
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width35 ft (10.8 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,837 (2022)
Projected traffic4,220 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Morgan ST over Terrebonne Bayou built?

It was built in 2003, making it 22 years old in 2025.

What condition is Morgan ST over Terrebonne Bayou 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 April 2023.

How much traffic does Morgan ST over Terrebonne Bayou carry?

About 3,837 vehicles per day (2022 count).

How long is Morgan ST over Terrebonne Bayou?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 35 ft wide.

Who owns Morgan ST over Terrebonne Bayou?

It is owned by the County Highway Agency.