US Bridges

I-20 & Ramp On/Off over Little Jackson Creek

Fair

Richland County, South Carolina · 1 MI NE of Dentsville · Structure no. 000000000004642

Built
1965
60 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
87,800
2023 count
Owner
State
State Highway Agency

About this bridge

I-20 & Ramp On/Off over Little Jackson Creek is a concrete culvert carrying I-20 & Ramp On/Off over Little Jackson Creek in Richland County, South Carolina. It was built in 1965, 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 87,800 vehicles a day, roughly 10% of them trucks, projected to reach 113,262 by 2043. The structure is 21 ft (6.4 m) long and 150 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-20 & Ramp On/Off
CrossesLittle Jackson Creek
Location1 MI NE of Dentsville
RouteInterstate 20
CountyRichland County
StateSouth Carolina
Coordinates34.07417, -80.95278
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.5 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width150 ft (45.7 m)
Roadway width88 ft (26.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic87,800 (2023)
Projected traffic113,262 by 2043
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$83,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-20 & Ramp On/Off over Little Jackson Creek built?

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

What condition is I-20 & Ramp On/Off over Little 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 & Ramp On/Off over Little Jackson Creek carry?

About 87,800 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I-20 & Ramp On/Off over Little Jackson Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 150 ft wide.

Who owns I-20 & Ramp On/Off over Little Jackson Creek?

It is owned by the State Highway Agency.