US Bridges

I0049 over Indian Bayou

Fair

Natchitoches Parish, Louisiana · 1.07 Mi. North of LA 174 · Structure no. 083504550647721

Built
1985
40 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
45 ft
3 main spans
Daily traffic
16,334
2021 count
Owner
State
State Highway Agency

About this bridge

I0049 over Indian Bayou is a concrete culvert carrying I0049 over Indian Bayou in Natchitoches Parish, Louisiana. It was built in 1985, so it is 40 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 5 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 16,334 vehicles a day, roughly 30% of them trucks, projected to reach 17,967 by 2041. The structure is 45 ft (13.7 m) long and 340 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesI0049
CrossesIndian Bayou
Location1.07 Mi. North of LA 174
RouteInterstate 49
CountyNatchitoches Parish
StateLouisiana
Coordinates31.89801, -93.38901
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span14 ft (4.3 m)
Deck width340 ft (103.6 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,334 (2021)
Projected traffic17,967 by 2041
Trucks30%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 over Indian Bayou built?

It was built in 1985, making it 40 years old in 2025.

What condition is I0049 over Indian 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 May 2024.

How much traffic does I0049 over Indian Bayou carry?

About 16,334 vehicles per day (2021 count), of which roughly 30% are trucks.

How long is I0049 over Indian Bayou?

The structure is 45 ft (13.7 m) long with a longest span of 14 ft (4.3 m) and a deck 340 ft wide.

Who owns I0049 over Indian Bayou?

It is owned by the State Highway Agency.