US Bridges

Allen RD over Tiger Bayou

Fair

West Carroll Parish, Louisiana · 0.5 MI W of LA 586 · Structure no. 056232529912541

Built
2006
19 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
160 ft
8 main spans
Daily traffic
184
2019 count
Owner
County
County Highway Agency

About this bridge

Allen RD over Tiger Bayou is a concrete slab carrying Allen RD over Tiger Bayou in West Carroll Parish, Louisiana. It was built in 2006, so it is 19 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 184 vehicles a day, projected to reach 202 by 2039. The structure is 160 ft (48.8 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesAllen RD
CrossesTiger Bayou
Location0.5 MI W of LA 586
RouteCounty Highway 0
CountyWest Carroll Parish
StateLouisiana
Coordinates32.93024, -91.42115
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating46.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans8
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span20 ft (6.1 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic184 (2019)
Projected traffic202 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Allen RD over Tiger Bayou built?

It was built in 2006, making it 19 years old in 2025.

What condition is Allen RD over Tiger 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 February 2023.

How much traffic does Allen RD over Tiger Bayou carry?

About 184 vehicles per day (2019 count).

How long is Allen RD over Tiger Bayou?

The structure is 160 ft (48.8 m) long with a longest span of 20 ft (6.1 m) and a deck 27 ft wide.

Who owns Allen RD over Tiger Bayou?

It is owned by the County Highway Agency.