US Bridges

Lake Bistineau RD over Toulon Bayou

FairPosted for load

Bienville Parish, Louisiana · 7.5 Mi. No. of LA 15 · Structure no. 040732237932081

Built
1963
62 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
180 ft
9 main spans
Daily traffic
400
2020 count
Owner
County
County Highway Agency

About this bridge

Lake Bistineau RD over Toulon Bayou is a concrete slab carrying Lake Bistineau RD over Toulon Bayou in Bienville Parish, Louisiana. It was built in 1963, so it is 62 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 400 vehicles a day, projected to reach 440 by 2040. The structure is 180 ft (54.9 m) long and 30 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesLake Bistineau RD
CrossesToulon Bayou
Location7.5 Mi. No. of LA 15
RouteCounty Highway 0
CountyBienville Parish
StateLouisiana
Coordinates32.39542, -93.34637
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.

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating24.3 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2020)
Projected traffic440 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Lake Bistineau RD over Toulon Bayou built?

It was built in 1963, making it 62 years old in 2025.

What condition is Lake Bistineau RD over Toulon 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 May 2023.

How much traffic does Lake Bistineau RD over Toulon Bayou carry?

About 400 vehicles per day (2020 count).

How long is Lake Bistineau RD over Toulon Bayou?

The structure is 180 ft (54.9 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns Lake Bistineau RD over Toulon Bayou?

It is owned by the County Highway Agency.