US Bridges

LA0001 over Black Bayou

Fair

Caddo Parish, Louisiana · 5.49M North of LA 170 · Structure no. 040900450305451

Built
1993
32 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
402 ft
20 main spans
Daily traffic
2,032
2021 count
Owner
State
State Highway Agency

About this bridge

LA0001 over Black Bayou is a concrete slab carrying LA0001 over Black Bayou in Caddo Parish, Louisiana. It was built in 1993, so it is 32 years old, younger 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 2,032 vehicles a day, roughly 26% of them trucks, projected to reach 2,235 by 2041. The structure is 402 ft (122.5 m) long and 47 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesLA0001
CrossesBlack Bayou
Location5.49M North of LA 170
RouteState Highway 1
CountyCaddo Parish
StateLouisiana
Coordinates32.95861, -93.9942
Functional classRural Minor Arterial

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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating48 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans20
Design loadHS 20
Structure length402 ft (122.5 m)
Longest span20 ft (6.1 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,032 (2021)
Projected traffic2,235 by 2041
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 LA0001 over Black Bayou built?

It was built in 1993, making it 32 years old in 2025.

What condition is LA0001 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 2025.

How much traffic does LA0001 over Black Bayou carry?

About 2,032 vehicles per day (2021 count), of which roughly 26% are trucks.

How long is LA0001 over Black Bayou?

The structure is 402 ft (122.5 m) long with a longest span of 20 ft (6.1 m) and a deck 47 ft wide.

Who owns LA0001 over Black Bayou?

It is owned by the State Highway Agency.