US Bridges

I 20 over Mississippi River

Fair

Warren County, Mississippi · Miss/La State Line · Structure no. 110002007500010

Built
1973
52 years old
Condition
Fair
inspected May 2024
Type
Truss - Thru
Steel Continuous
Length
11,052 ft
3 main spans
Daily traffic
23,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 20 over Mississippi River is a steel continuous truss - thru carrying I 20 over Mississippi River in Warren County, Mississippi. It was built in 1973, so it is 52 years old, older than the Mississippi average of 38.9 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 23,000 vehicles a day, roughly 32% of them trucks, projected to reach 23,000 by 2043. The structure is 11,052 ft (3,368.7 m) long and 65 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesI 20
CrossesMississippi River
LocationMiss/La State Line
RouteInterstate 20
Coordinates32.3215, -90.93347
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+112 approach)
Design loadHL 93
Structure length11,052 ft (3,368.7 m)
Longest span870 ft (265.2 m)
Deck width65 ft (19.8 m)
Roadway width61 ft (18.5 m)
Vertical clearance over deck31 ft (9.6 m)

Traffic and service

Average daily traffic23,000 (2023)
Projected traffic23,000 by 2043
Trucks32%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I 20 over Mississippi River built?

It was built in 1973, making it 52 years old in 2025.

What condition is I 20 over Mississippi River 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 I 20 over Mississippi River carry?

About 23,000 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is I 20 over Mississippi River?

The structure is 11,052 ft (3,368.7 m) long with a longest span of 870 ft (265.2 m) and a deck 65 ft wide.

Who owns I 20 over Mississippi River?

It is owned by the State Highway Agency.