US Bridges

LA0436 over Thomas Branch

Fair

Washington Parish, Louisiana · LA0436 · Structure no. 625902740108761

Built
1957
68 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
1,148
2021 count
Owner
State
State Highway Agency

About this bridge

LA0436 over Thomas Branch is a concrete slab carrying LA0436 over Thomas Branch in Washington Parish, Louisiana. It was built in 1957, so it is 68 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 1,148 vehicles a day, roughly 12% of them trucks, projected to reach 1,262 by 2041. The structure is 120 ft (36.6 m) long and 29 ft wide.

Location

Open in Google Maps
CarriesLA0436
CrossesThomas Branch
LocationLA0436
RouteState Highway 436
CountyWashington Parish
StateLouisiana
Coordinates30.90881, -90.0361
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,148 (2021)
Projected traffic1,262 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$585,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0436 over Thomas Branch built?

It was built in 1957, making it 68 years old in 2025.

What condition is LA0436 over Thomas 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 July 2024.

How much traffic does LA0436 over Thomas Branch carry?

About 1,148 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0436 over Thomas Branch?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 29 ft wide.

Who owns LA0436 over Thomas Branch?

It is owned by the State Highway Agency.