US Bridges

US 84 over Mississippi River

FairPosted for load

Adams County, Mississippi · Miss/La State Line · Structure no. 21000840010001A

Built
1940
85 years old
Condition
Fair
inspected October 2024
Type
Truss - Thru
Steel Continuous
Length
4,205 ft
5 main spans
Daily traffic
11,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 84 over Mississippi River is a steel continuous truss - thru carrying US 84 over Mississippi River in Adams County, Mississippi. It was built in 1940, so it is 85 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. Its operating status is: posted for load restriction.

It carries about 11,000 vehicles a day, roughly 6% of them trucks, projected to reach 11,000 by 2043. The structure is 4,205 ft (1,281.7 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 84
CrossesMississippi River
LocationMiss/La State Line
RouteU.S. Route 84
CountyAdams County
StateMississippi
Coordinates31.556, -91.41619
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.3 US tons
Inventory rating25.2 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5 (+6 approach)
Design loadH 15
Structure length4,205 ft (1,281.7 m)
Longest span875 ft (266.7 m)
Deck width34 ft (10.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck16 ft (4.8 m)

Traffic and service

Average daily traffic11,000 (2023)
Projected traffic11,000 by 2043
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 US 84 over Mississippi River built?

It was built in 1940, making it 85 years old in 2025.

What condition is US 84 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 October 2024.

How much traffic does US 84 over Mississippi River carry?

About 11,000 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 84 over Mississippi River?

The structure is 4,205 ft (1,281.7 m) long with a longest span of 875 ft (266.7 m) and a deck 34 ft wide.

Who owns US 84 over Mississippi River?

It is owned by the State Highway Agency.