US Bridges

I0049 over Dolet Swamp

Good

De Soto Parish, Louisiana · 1.08 M N of LA 177 Intr · Structure no. 041604550704222

Built
1989
36 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,000 ft
20 main spans
Daily traffic
28,142
2021 count
Owner
State
State Highway Agency

About this bridge

I0049 over Dolet Swamp is a prestressed concrete continuous stringer/multi-beam or girder carrying I0049 over Dolet Swamp in De Soto Parish, Louisiana. It was built in 1989, so it is 36 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 28,142 vehicles a day, roughly 36% of them trucks, projected to reach 30,956 by 2041. The structure is 1,000 ft (304.8 m) long and 43 ft wide.

CarriesI0049
CrossesDolet Swamp
Location1.08 M N of LA 177 Intr
RouteInterstate 49
Coordinates31.97558, -93.4661
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans20
Design loadHS 20
Structure length1,000 ft (304.8 m)
Longest span50 ft (15.2 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,142 (2021)
Projected traffic30,956 by 2041
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Dolet Swamp built?

It was built in 1989, making it 36 years old in 2025.

What condition is I0049 over Dolet Swamp 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 May 2023.

How much traffic does I0049 over Dolet Swamp carry?

About 28,142 vehicles per day (2021 count), of which roughly 36% are trucks.

How long is I0049 over Dolet Swamp?

The structure is 1,000 ft (304.8 m) long with a longest span of 50 ft (15.2 m) and a deck 43 ft wide.

Who owns I0049 over Dolet Swamp?

It is owned by the State Highway Agency.