US Bridges

I 55 over Rocky Bluff Road

Fair

Lincoln County, Mississippi · 6.6 MI N US 84 · Structure no. 11000550430442A

Built
1966
59 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
155 ft
3 main spans
Daily traffic
10,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 55 over Rocky Bluff Road is a prestressed concrete stringer/multi-beam or girder carrying I 55 over Rocky Bluff Road 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 30% of them trucks, projected to reach 14,000 by 2043. The structure is 155 ft (47.2 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 55
CrossesRocky Bluff Road
Location6.6 MI N US 84
RouteInterstate 55
Coordinates31.63693, -90.45738
Functional classRural 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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 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 rating71.1 US tons
Inventory rating38.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length155 ft (47.2 m)
Longest span51 ft (15.5 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,500 (2023)
Projected traffic14,000 by 2043
Trucks30%
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 55 over Rocky Bluff Road built?

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

What condition is I 55 over Rocky Bluff Road 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 February 2025.

How much traffic does I 55 over Rocky Bluff Road carry?

About 10,500 vehicles per day (2023 count), of which roughly 30% are trucks.

How long is I 55 over Rocky Bluff Road?

The structure is 155 ft (47.2 m) long with a longest span of 51 ft (15.5 m) and a deck 41 ft wide.

Who owns I 55 over Rocky Bluff Road?

It is owned by the State Highway Agency.