US Bridges

I0049 Service RD over Bayou Calahan

Fair

St. Landry Parish, Louisiana · 1.94 MI S of LA 31 · Structure no. 034904550208074

Built
1982
43 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
180 ft
9 main spans
Daily traffic
4,451
2021 count
Owner
State
State Highway Agency

About this bridge

I0049 Service RD over Bayou Calahan is a concrete slab carrying I0049 Service RD over Bayou Calahan in St. Landry Parish, Louisiana. It was built in 1982, so it is 43 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 4,451 vehicles a day, roughly 9% of them trucks, projected to reach 4,896 by 2041. The structure is 180 ft (54.9 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI0049 Service RD
CrossesBayou Calahan
Location1.94 MI S of LA 31
RouteInterstate 49
CountySt. Landry Parish
StateLouisiana
Coordinates30.49095, -92.0741
Functional classUrban Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47 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 width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,451 (2021)
Projected traffic4,896 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 I0049 Service RD over Bayou Calahan built?

It was built in 1982, making it 43 years old in 2025.

What condition is I0049 Service RD over Bayou Calahan 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 September 2024.

How much traffic does I0049 Service RD over Bayou Calahan carry?

About 4,451 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is I0049 Service RD over Bayou Calahan?

The structure is 180 ft (54.9 m) long with a longest span of 20 ft (6.1 m) and a deck 35 ft wide.

Who owns I0049 Service RD over Bayou Calahan?

It is owned by the State Highway Agency.