US Bridges

LA1077 over Tchefuncte River

Fair

St. Tammany Parish, Louisiana · LA1077 · Structure no. 625208520600231

Built
1957
68 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
460 ft
1 main span
Daily traffic
883
2021 count
Owner
State
State Highway Agency

About this bridge

LA1077 over Tchefuncte River is a steel stringer/multi-beam or girder carrying LA1077 over Tchefuncte River 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 460 ft (140.2 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesLA1077
CrossesTchefuncte River
LocationLA1077
RouteState Highway 1077
CountySt. Tammany Parish
StateLouisiana
Coordinates30.5752, -90.2402
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating41 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+20 approach)
Design loadH 15
Structure length460 ft (140.2 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.8 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 closed9.9 mi (16 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.9 million
NavigationNo navigation control on waterway

Frequently asked questions

When was LA1077 over Tchefuncte River built?

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

What condition is LA1077 over Tchefuncte River 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 LA1077 over Tchefuncte River carry?

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

How long is LA1077 over Tchefuncte River?

The structure is 460 ft (140.2 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns LA1077 over Tchefuncte River?

It is owned by the State Highway Agency.