US Bridges

I-20 over Big Jackson Creek

Fair

Richland County, South Carolina · 7MI NE of Cola · Structure no. 000000000004644

Built
1965
60 years old, rebuilt 1986
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
180 ft
6 main spans
Daily traffic
72,100
2023 count
Owner
State
State Highway Agency

About this bridge

I-20 over Big Jackson Creek is a concrete tee beam carrying I-20 over Big Jackson Creek in Richland County, South Carolina. It was built in 1965 and reconstructed in 1986, 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 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 72,100 vehicles a day, roughly 9% of them trucks, projected to reach 93,009 by 2043. The structure is 180 ft (54.9 m) long and 105 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-20
CrossesBig Jackson Creek
Location7MI NE of Cola
RouteInterstate 20
Coordinates34.07139, -80.93583
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating50.7 US tons
Inventory rating38.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length180 ft (54.9 m)
Longest span30 ft (9.1 m)
Deck width105 ft (32.1 m)
Roadway width102 ft (31.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72,100 (2023)
Projected traffic93,009 by 2043
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-20 over Big Jackson Creek built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1986.

What condition is I-20 over Big Jackson Creek 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 Big Jackson Creek carry?

About 72,100 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-20 over Big Jackson Creek?

The structure is 180 ft (54.9 m) long with a longest span of 30 ft (9.1 m) and a deck 105 ft wide.

Who owns I-20 over Big Jackson Creek?

It is owned by the State Highway Agency.