Sartor RD over Alligator Bayou

Fair

Caddo Parish, Louisiana · 1.3M East of LA 3049 · Structure no. 040932496934821

Built: 1992; 33 years old
Condition: Fair; inspected March 2023
Type: Slab; Concrete
Length: 57 ft; 3 main spans
Daily traffic: 57; 2019 count
Owner: County; County Highway Agency

About this bridge

Sartor RD over Alligator Bayou is a concrete slab carrying Sartor RD over Alligator Bayou in Caddo Parish, Louisiana. It was built in 1992, so it is 33 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 57 vehicles a day, projected to reach 62 by 2039. The structure is 57 ft (17.4 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesSartor RD

CrossesAlligator Bayou

Location1.3M East of LA 3049

RouteCounty Highway 0

CountyCaddo Parish

StateLouisiana

Coordinates32.82611, -93.82127

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.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	6 Satisfactory	Structural elements show some minor deterioration.
Channel and channel protection	8 Very Good	No problems noted.

Last inspectionMarch 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourScour critical; foundations unstable for calculated scour conditions

Structural evaluation6: Equal to present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating29.7 US tons

Inventory rating22.8 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 width31 ft (9.5 m)

Roadway width28 ft (8.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57 (2019)

Projected traffic62 by 2039

Trucks—

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed1.9 mi (3 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 Sartor RD over Alligator Bayou built?

It was built in 1992, making it 33 years old in 2025.

What condition is Sartor RD over Alligator 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 March 2023.

How much traffic does Sartor RD over Alligator Bayou carry?

About 57 vehicles per day (2019 count).

How long is Sartor RD over Alligator Bayou?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns Sartor RD over Alligator Bayou?

It is owned by the County Highway Agency.