US Bridges

LA0128 over Indian Slough Canal

Good

Tensas Parish, Louisiana · 1.2 Miles NW of LA 605 · Structure no. 585400203002221

Built
1932
93 years old
Condition
Good
inspected February 2024
Type
Culvert
Concrete
Length
33 ft
5 main spans
Daily traffic
2,306
2021 count
Owner
State
State Highway Agency

About this bridge

LA0128 over Indian Slough Canal is a concrete culvert carrying LA0128 over Indian Slough Canal in Tensas Parish, Louisiana. It was built in 1932, so it is 93 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,306 vehicles a day, roughly 21% of them trucks, projected to reach 2,536 by 2041. The structure is 33 ft (10.1 m) long and 58 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesLA0128
CrossesIndian Slough Canal
Location1.2 Miles NW of LA 605
RouteState Highway 128
Coordinates31.93018, -91.2486
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadH 15
Structure length33 ft (10.1 m)
Longest span6 ft (1.8 m)
Deck width58 ft (17.7 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,306 (2021)
Projected traffic2,536 by 2041
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0128 over Indian Slough Canal built?

It was built in 1932, making it 93 years old in 2025.

What condition is LA0128 over Indian Slough Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does LA0128 over Indian Slough Canal carry?

About 2,306 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is LA0128 over Indian Slough Canal?

The structure is 33 ft (10.1 m) long with a longest span of 6 ft (1.8 m) and a deck 58 ft wide.

Who owns LA0128 over Indian Slough Canal?

It is owned by the State Highway Agency.