US Bridges

LA0935 over Black Bayou

Fair

Ascension Parish, Louisiana · 1.7 Mi. N. of LA 22 · Structure no. 610308031002341

Built
1960
65 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
140 ft
7 main spans
Daily traffic
1,790
2021 count
Owner
State
State Highway Agency

About this bridge

LA0935 over Black Bayou is a concrete slab carrying LA0935 over Black Bayou in Ascension Parish, Louisiana. It was built in 1960, so it is 65 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 1,790 vehicles a day, roughly 11% of them trucks, projected to reach 1,969 by 2041. The structure is 140 ft (42.7 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesLA0935
CrossesBlack Bayou
Location1.7 Mi. N. of LA 22
RouteState Highway 935
Coordinates30.23923, -90.83181
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating28.2 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,790 (2021)
Projected traffic1,969 by 2041
Trucks11%
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 LA0935 over Black Bayou built?

It was built in 1960, making it 65 years old in 2025.

What condition is LA0935 over Black Bayou 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 October 2024.

How much traffic does LA0935 over Black Bayou carry?

About 1,790 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0935 over Black Bayou?

The structure is 140 ft (42.7 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA0935 over Black Bayou?

It is owned by the State Highway Agency.