US Bridges

LA0538 over Twelve Mile Bayou

Fair

Caddo Parish, Louisiana · 00.15 MI N. of LA 3049 · Structure no. 040900780200151

Built
2005
20 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
760 ft
4 main spans
Daily traffic
6,777
2021 count
Owner
State
State Highway Agency

About this bridge

LA0538 over Twelve Mile Bayou is a steel continuous stringer/multi-beam or girder carrying LA0538 over Twelve Mile Bayou in Caddo Parish, Louisiana. It was built in 2005, so it is 20 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 6,777 vehicles a day, roughly 10% of them trucks, projected to reach 7,454 by 2041. The structure is 760 ft (231.6 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLA0538
CrossesTwelve Mile Bayou
Location00.15 MI N. of LA 3049
RouteState Highway 538
CountyCaddo Parish
StateLouisiana
Coordinates32.55554, -93.7733
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating64 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+11 approach)
Design loadHS 20
Structure length760 ft (231.6 m)
Longest span180 ft (54.9 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic6,777 (2021)
Projected traffic7,454 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0538 over Twelve Mile Bayou built?

It was built in 2005, making it 20 years old in 2025.

What condition is LA0538 over Twelve Mile 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 January 2025.

How much traffic does LA0538 over Twelve Mile Bayou carry?

About 6,777 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is LA0538 over Twelve Mile Bayou?

The structure is 760 ft (231.6 m) long with a longest span of 180 ft (54.9 m) and a deck 43 ft wide.

Who owns LA0538 over Twelve Mile Bayou?

It is owned by the State Highway Agency.