US Bridges

LA1010 over Bayou Lafourche

FairPosted for load

Assumption Parish, Louisiana · LA1010 · Structure no. 610408043400031

Built
1954
71 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
176 ft
1 main span
Daily traffic
143
2021 count
Owner
State
State Highway Agency

About this bridge

LA1010 over Bayou Lafourche is a steel stringer/multi-beam or girder carrying LA1010 over Bayou Lafourche in Assumption Parish, Louisiana. It was built in 1954, so it is 71 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. Its operating status is: posted for load restriction.

It carries about 143 vehicles a day, roughly 11% of them trucks, projected to reach 157 by 2041. The structure is 176 ft (53.6 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesLA1010
CrossesBayou Lafourche
LocationLA1010
RouteState Highway 1010
CountyAssumption Parish
StateLouisiana
Coordinates29.89864, -90.98901
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37 US tons
Inventory rating24 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1 (+6 approach)
Design loadH 15
Structure length176 ft (53.6 m)
Longest span61 ft (18.6 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic143 (2021)
Projected traffic157 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 LA1010 over Bayou Lafourche built?

It was built in 1954, making it 71 years old in 2025.

What condition is LA1010 over Bayou Lafourche 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 August 2023.

How much traffic does LA1010 over Bayou Lafourche carry?

About 143 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA1010 over Bayou Lafourche?

The structure is 176 ft (53.6 m) long with a longest span of 61 ft (18.6 m) and a deck 22 ft wide.

Who owns LA1010 over Bayou Lafourche?

It is owned by the State Highway Agency.