US Bridges

I0049 over LA 493

Good

Natchitoches Parish, Louisiana · Int. I-49 North & LA 493 · Structure no. 083504550614401

Built
1986
39 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
206 ft
3 main spans
Daily traffic
18,305
2021 count
Owner
State
State Highway Agency

About this bridge

I0049 over LA 493 is a prestressed concrete continuous stringer/multi-beam or girder carrying I0049 over LA 493 in Natchitoches Parish, Louisiana. It was built in 1986, so it is 39 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 18,305 vehicles a day, roughly 30% of them trucks, projected to reach 20,135 by 2041. The structure is 206 ft (62.8 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI0049
CrossesLA 493
LocationInt. I-49 North & LA 493
RouteInterstate 49
Coordinates31.56821, -92.9952
Functional classRural Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length206 ft (62.8 m)
Longest span68 ft (20.7 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,305 (2021)
Projected traffic20,135 by 2041
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I0049 over LA 493 built?

It was built in 1986, making it 39 years old in 2025.

What condition is I0049 over LA 493 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 June 2024.

How much traffic does I0049 over LA 493 carry?

About 18,305 vehicles per day (2021 count), of which roughly 30% are trucks.

How long is I0049 over LA 493?

The structure is 206 ft (62.8 m) long with a longest span of 68 ft (20.7 m) and a deck 43 ft wide.

Who owns I0049 over LA 493?

It is owned by the State Highway Agency.