US Bridges

Letourneau RD over I-20

Fair

Madison Parish, Louisiana · 1.4 MI E of LA 602-2 · Structure no. 053304510829021

Built
1976
49 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
278 ft
4 main spans
Daily traffic
24,300
2016 count
Owner
State
State Highway Agency

About this bridge

Letourneau RD over I-20 is a prestressed concrete stringer/multi-beam or girder carrying Letourneau RD over I-20 in Madison Parish, Louisiana. It was built in 1976, so it is 49 years old, older 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 24,300 vehicles a day, roughly 37% of them trucks, projected to reach 26,730 by 2036. The structure is 278 ft (84.7 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesLetourneau RD
CrossesI-20
Location1.4 MI E of LA 602-2
RouteCounty Highway 0
CountyMadison Parish
StateLouisiana
Coordinates32.32637, -91.00025
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length278 ft (84.7 m)
Longest span88 ft (26.8 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,300 (2016)
Projected traffic26,730 by 2036
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Letourneau RD over I-20 built?

It was built in 1976, making it 49 years old in 2025.

What condition is Letourneau RD over I-20 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 July 2023.

How much traffic does Letourneau RD over I-20 carry?

About 24,300 vehicles per day (2016 count), of which roughly 37% are trucks.

How long is Letourneau RD over I-20?

The structure is 278 ft (84.7 m) long with a longest span of 88 ft (26.8 m) and a deck 30 ft wide.

Who owns Letourneau RD over I-20?

It is owned by the State Highway Agency.