US Bridges

I 55 over US 84

Fair

Lincoln County, Mississippi · I 55 over US 84 · Structure no. 11000550430375A

Built
1966
59 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
293 ft
2 main spans
Daily traffic
10,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 55 over US 84 is a concrete continuous box beam or girders - single or spread carrying I 55 over US 84 in Lincoln County, Mississippi. It was built in 1966, so it is 59 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 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 10,500 vehicles a day, roughly 23% of them trucks, projected to reach 12,000 by 2043. The structure is 293 ft (89.3 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 55
CrossesUS 84
LocationI 55 over US 84
RouteInterstate 55
CountyLincoln County
StateMississippi
Coordinates31.54257, -90.47997
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.3 US tons
Inventory rating64.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length293 ft (89.3 m)
Longest span83 ft (25.3 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic12,000 by 2043
Trucks23%
Lanes on structure20
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$433 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 55 over US 84 built?

It was built in 1966, making it 59 years old in 2025.

What condition is I 55 over US 84 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 January 2025.

How much traffic does I 55 over US 84 carry?

About 10,500 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is I 55 over US 84?

The structure is 293 ft (89.3 m) long with a longest span of 83 ft (25.3 m) and a deck 45 ft wide.

Who owns I 55 over US 84?

It is owned by the State Highway Agency.