US Bridges

LA0983 over Tiger Bayou

Poor

West Baton Rouge Parish, Louisiana · 4.13 MI N JCT US 61 · Structure no. 616108610304131

Built
1983
42 years old
Condition
Poor
inspected July 2024
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
2,000
2021 count
Owner
State
State Highway Agency

About this bridge

LA0983 over Tiger Bayou is a concrete slab carrying LA0983 over Tiger Bayou in West Baton Rouge Parish, Louisiana. It was built in 1983, so it is 42 years old, younger 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 2,000 vehicles a day, roughly 10% of them trucks, projected to reach 2,200 by 2041. The structure is 57 ft (17.4 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0983
CrossesTiger Bayou
Location4.13 MI N JCT US 61
RouteState Highway 983
CountyWest Baton Rouge Parish
StateLouisiana
Coordinates30.5633, -91.33853
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJuly 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2021)
Projected traffic2,200 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$312,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0983 over Tiger Bayou built?

It was built in 1983, making it 42 years old in 2025.

What condition is LA0983 over Tiger 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 July 2024.

How much traffic does LA0983 over Tiger Bayou carry?

About 2,000 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0983 over Tiger Bayou?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 43 ft wide.

Who owns LA0983 over Tiger Bayou?

It is owned by the State Highway Agency.