US Bridges

LA0741 over Bayou Portage

Fair

St. Landry Parish, Louisiana · 4.08 MI South of LA 103 · Structure no. 034908491004081

Built
1959
66 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
1,629
2021 count
Owner
State
State Highway Agency

About this bridge

LA0741 over Bayou Portage is a concrete slab carrying LA0741 over Bayou Portage in St. Landry Parish, Louisiana. It was built in 1959, so it is 66 years old, older 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 1,629 vehicles a day, roughly 12% of them trucks, projected to reach 1,791 by 2041. The structure is 100 ft (30.5 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0741
CrossesBayou Portage
Location4.08 MI South of LA 103
RouteState Highway 741
CountySt. Landry Parish
StateLouisiana
Coordinates30.50533, -91.94983
Functional classRural Minor Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width34 ft (10.3 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,629 (2021)
Projected traffic1,791 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0741 over Bayou Portage built?

It was built in 1959, making it 66 years old in 2025.

What condition is LA0741 over Bayou Portage 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 LA0741 over Bayou Portage carry?

About 1,629 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0741 over Bayou Portage?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 34 ft wide.

Who owns LA0741 over Bayou Portage?

It is owned by the State Highway Agency.