US Bridges

LA 1078 over Horse Branch

Fair

St. Tammany Parish, Louisiana · 1.6 Miles West of LA 25 · Structure no. 625208520604621

Built
1957
68 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
883
2021 count
Owner
State
State Highway Agency

About this bridge

LA 1078 over Horse Branch is a concrete slab carrying LA 1078 over Horse Branch in St. Tammany 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 883 vehicles a day, roughly 13% of them trucks, projected to reach 971 by 2041. The structure is 100 ft (30.5 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLA 1078
CrossesHorse Branch
Location1.6 Miles West of LA 25
RouteState Highway 1078
CountySt. Tammany Parish
StateLouisiana
Coordinates30.55873, -90.178
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
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 alignment8: Equal to present desirable criteria
Operating rating38 US tons
Inventory rating23 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic883 (2021)
Projected traffic971 by 2041
Trucks13%
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

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 LA 1078 over Horse Branch built?

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

What condition is LA 1078 over Horse 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 2023.

How much traffic does LA 1078 over Horse Branch carry?

About 883 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is LA 1078 over Horse Branch?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA 1078 over Horse Branch?

It is owned by the State Highway Agency.