US Bridges

I-20 over Sc 555 Sou RR Frtg RD

Fair

Richland County, South Carolina · 6 MI N of Cola · Structure no. 000000000004641

Built
1965
60 years old, rebuilt 1987
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
338 ft
6 main spans
Daily traffic
105,700
2023 count
Owner
State
State Highway Agency

About this bridge

I-20 over Sc 555 Sou RR Frtg RD is a prestressed concrete stringer/multi-beam or girder carrying I-20 over Sc 555 Sou RR Frtg RD in Richland County, South Carolina. It was built in 1965 and reconstructed in 1987, so it is 60 years old, older than the South Carolina average of 48 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 105,700 vehicles a day, roughly 10% of them trucks, projected to reach 131,068 by 2043. The structure is 338 ft (103 m) long and 123 ft wide.

CarriesI-20
CrossesSc 555 Sou RR Frtg RD
Location6 MI N of Cola
RouteInterstate 20
Coordinates34.07297, -80.97848
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.2 US tons
Inventory rating25.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length338 ft (103 m)
Longest span72 ft (21.9 m)
Deck width123 ft (37.6 m)
Roadway width120 ft (36.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105,700 (2023)
Projected traffic131,068 by 2043
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
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$1.9 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-20 over Sc 555 Sou RR Frtg RD built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1987.

What condition is I-20 over Sc 555 Sou RR Frtg RD 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 2024.

How much traffic does I-20 over Sc 555 Sou RR Frtg RD carry?

About 105,700 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I-20 over Sc 555 Sou RR Frtg RD?

The structure is 338 ft (103 m) long with a longest span of 72 ft (21.9 m) and a deck 123 ft wide.

Who owns I-20 over Sc 555 Sou RR Frtg RD?

It is owned by the State Highway Agency.