US Bridges

LA0605 over Derussy Bayou

Good

Tensas Parish, Louisiana · 1.87 Miles from the Junct · Structure no. 585400000580158

Built
2006
19 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete
Length
60 ft
3 main spans
Daily traffic
236
2021 count
Owner
State
State Highway Agency

About this bridge

LA0605 over Derussy Bayou is a concrete slab carrying LA0605 over Derussy Bayou in Tensas 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 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 236 vehicles a day, roughly 15% of them trucks, projected to reach 259 by 2041. The structure is 60 ft (18.3 m) long and 34 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0605
CrossesDerussy Bayou
Location1.87 Miles from the Junct
RouteState Highway 605
CountyTensas Parish
StateLouisiana
Coordinates32.14065, -91.22407
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic236 (2021)
Projected traffic259 by 2041
Trucks15%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was LA0605 over Derussy Bayou built?

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

What condition is LA0605 over Derussy Bayou 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 November 2023.

How much traffic does LA0605 over Derussy Bayou carry?

About 236 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is LA0605 over Derussy Bayou?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 34 ft wide.

Who owns LA0605 over Derussy Bayou?

It is owned by the State Highway Agency.