US Bridges

LA0385 over S Fork Black Bayou

Poor

Cameron Parish, Louisiana · 1.0 Mi. N of LA 384 · Structure no. 071201950201021

Built
1954
71 years old
Condition
Poor
inspected February 2023
Type
Slab
Concrete
Length
120 ft
6 main spans
Daily traffic
4,633
2021 count
Owner
State
State Highway Agency

About this bridge

LA0385 over S Fork Black Bayou is a concrete slab carrying LA0385 over S Fork Black Bayou in Cameron 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,633 vehicles a day, roughly 17% of them trucks, projected to reach 5,096 by 2041. The structure is 120 ft (36.6 m) long and 29 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesLA0385
CrossesS Fork Black Bayou
Location1.0 Mi. N of LA 384
RouteState Highway 385
Coordinates30.02649, -93.21268
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,633 (2021)
Projected traffic5,096 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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$585,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0385 over S Fork Black Bayou built?

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

What condition is LA0385 over S Fork Black Bayou in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2023.

How much traffic does LA0385 over S Fork Black Bayou carry?

About 4,633 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is LA0385 over S Fork Black Bayou?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 29 ft wide.

Who owns LA0385 over S Fork Black Bayou?

It is owned by the State Highway Agency.