LA0916 over Black Bayou

Fair

Catahoula Parish, Louisiana · 1.7 MI N of LA 8 · Structure no. 581308130401731

Built: 1965; 60 years old
Condition: Fair; inspected January 2024
Type: Slab; Concrete
Length: 76 ft; 4 main spans
Daily traffic: 55; 2021 count
Owner: State; State Highway Agency

About this bridge

LA0916 over Black Bayou is a concrete slab carrying LA0916 over Black Bayou in Catahoula Parish, Louisiana. It was built in 1965, so it is 60 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.

It carries about 55 vehicles a day, roughly 11% of them trucks, projected to reach 60 by 2041. The structure is 76 ft (23.2 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesLA0916

CrossesBlack Bayou

Location1.7 MI N of LA 8

RouteState Highway 916

CountyCatahoula Parish

StateLouisiana

Coordinates31.86176, -91.6895

Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionJanuary 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 geometry6: Equal to present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating48 US tons

Inventory rating28 US tons

Structure

Structure typeSlab

MaterialConcrete

DeckConcrete, precast panels

Main spans4

Design loadHS 20

Structure length76 ft (23.2 m)

Longest span19 ft (5.8 m)

Deck width28 ft (8.4 m)

Roadway width24 ft (7.4 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2021)

Projected traffic60 by 2041

Trucks11%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.1 mi (5 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 LA0916 over Black Bayou built?

It was built in 1965, making it 60 years old in 2025.

What condition is LA0916 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 January 2024.

How much traffic does LA0916 over Black Bayou carry?

About 55 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0916 over Black Bayou?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 28 ft wide.

Who owns LA0916 over Black Bayou?

It is owned by the State Highway Agency.