US Bridges

I 55 over SR 12

Fair

Holmes County, Mississippi · I 55 over SR 12 · Structure no. 11000550261550A

Built
1971
54 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
626 ft
3 main spans
Daily traffic
7,500
2023 count
Owner
State
State Highway Agency

About this bridge

I 55 over SR 12 is a prestressed concrete stringer/multi-beam or girder carrying I 55 over SR 12 in Holmes County, Mississippi. It was built in 1971, so it is 54 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 7,500 vehicles a day, roughly 34% of them trucks, projected to reach 7,500 by 2043. The structure is 626 ft (190.8 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 55
CrossesSR 12
LocationI 55 over SR 12
RouteInterstate 55
Coordinates33.09869, -89.89542
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.7 US tons
Inventory rating41.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadHS 20 + Mod
Structure length626 ft (190.8 m)
Longest span76 ft (23.2 m)
Deck width52 ft (15.8 m)
Roadway width49 ft (14.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2023)
Projected traffic7,500 by 2043
Trucks34%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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 SR 12 built?

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

What condition is I 55 over SR 12 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 2024.

How much traffic does I 55 over SR 12 carry?

About 7,500 vehicles per day (2023 count), of which roughly 34% are trucks.

How long is I 55 over SR 12?

The structure is 626 ft (190.8 m) long with a longest span of 76 ft (23.2 m) and a deck 52 ft wide.

Who owns I 55 over SR 12?

It is owned by the State Highway Agency.