US Bridges

Brown RD over I-20

Fair

Madison Parish, Louisiana · 2.2 MI West of LA 577 · Structure no. 053304510800861

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
271 ft
4 main spans
Daily traffic
22,200
2016 count
Owner
State
State Highway Agency

About this bridge

Brown RD over I-20 is a prestressed concrete stringer/multi-beam or girder carrying Brown RD over I-20 in Madison Parish, Louisiana. It was built in 1971, so it is 54 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 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 22,200 vehicles a day, roughly 37% of them trucks, projected to reach 24,420 by 2036. The structure is 271 ft (82.6 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBrown RD
CrossesI-20
Location2.2 MI West of LA 577
RouteCounty Highway 0
CountyMadison Parish
StateLouisiana
Coordinates32.43691, -91.45792
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length271 ft (82.6 m)
Longest span89 ft (27.1 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,200 (2016)
Projected traffic24,420 by 2036
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 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 Brown RD over I-20 built?

It was built in 1971, making it 54 years old in 2025.

What condition is Brown 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 June 2023.

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

About 22,200 vehicles per day (2016 count), of which roughly 37% are trucks.

How long is Brown RD over I-20?

The structure is 271 ft (82.6 m) long with a longest span of 89 ft (27.1 m) and a deck 30 ft wide.

Who owns Brown RD over I-20?

It is owned by the State Highway Agency.