US Bridges

LA0531 over Branch

Fair

Webster Parish, Louisiana · 6.6 MI North of LA 792 · Structure no. 046001110107851

Built
1970
55 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
58 ft
3 main spans
Daily traffic
1,230
2021 count
Owner
State
State Highway Agency

About this bridge

LA0531 over Branch is a concrete slab carrying LA0531 over Branch in Webster Parish, Louisiana. It was built in 1970, so it is 55 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 5 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 1,230 vehicles a day, roughly 19% of them trucks, projected to reach 1,353 by 2041. The structure is 58 ft (17.7 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLA0531
CrossesBranch
Location6.6 MI North of LA 792
RouteState Highway 531
CountyWebster Parish
StateLouisiana
Coordinates32.53456, -93.2414
Functional classRural Major 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,230 (2021)
Projected traffic1,353 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 LA0531 over Branch built?

It was built in 1970, making it 55 years old in 2025.

What condition is LA0531 over Branch 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 September 2024.

How much traffic does LA0531 over Branch carry?

About 1,230 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0531 over Branch?

The structure is 58 ft (17.7 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0531 over Branch?

It is owned by the State Highway Agency.