US Bridges

I 55 over SR 27

Fair

Copiah County, Mississippi · I 55 over SR 27 · Structure no. 11000550150709B

Built
1960
65 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
252 ft
4 main spans
Daily traffic
12,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 55 over SR 27 is a prestressed concrete stringer/multi-beam or girder carrying I 55 over SR 27 in Copiah County, Mississippi. It was built in 1960, so it is 65 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 12,000 vehicles a day, roughly 29% of them trucks, projected to reach 12,500 by 2043. The structure is 252 ft (76.8 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 55
CrossesSR 27
LocationI 55 over SR 27
RouteInterstate 55
Coordinates32.01452, -90.36194
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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.3 US tons
Inventory rating48.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length252 ft (76.8 m)
Longest span70 ft (21.3 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2023)
Projected traffic12,500 by 2043
Trucks29%
Lanes on structure2
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$401 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 55 over SR 27 built?

It was built in 1960, making it 65 years old in 2025.

What condition is I 55 over SR 27 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 August 2023.

How much traffic does I 55 over SR 27 carry?

About 12,000 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is I 55 over SR 27?

The structure is 252 ft (76.8 m) long with a longest span of 70 ft (21.3 m) and a deck 31 ft wide.

Who owns I 55 over SR 27?

It is owned by the State Highway Agency.