US Bridges

I-20 EB over S-49

Fair

Aiken County, South Carolina · 12 MI NE of Aiken · Structure no. 000000000005649

Built
1970
55 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
270 ft
4 main spans
Daily traffic
18,200
2023 count
Owner
State
State Highway Agency

About this bridge

I-20 EB over S-49 is a steel stringer/multi-beam or girder carrying I-20 EB over S-49 in Aiken County, South Carolina. It was built in 1970, so it is 55 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 18,200 vehicles a day, roughly 22% of them trucks, projected to reach 29,120 by 2043. The structure is 270 ft (82.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-20 EB
CrossesS-49
Location12 MI NE of Aiken
RouteInterstate 20
Coordinates33.72202, -81.56757
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating54.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length270 ft (82.3 m)
Longest span71 ft (21.5 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,200 (2023)
Projected traffic29,120 by 2043
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-20 EB over S-49 built?

It was built in 1970, making it 55 years old in 2025.

What condition is I-20 EB over S-49 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 EB over S-49 carry?

About 18,200 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is I-20 EB over S-49?

The structure is 270 ft (82.3 m) long with a longest span of 71 ft (21.5 m) and a deck 43 ft wide.

Who owns I-20 EB over S-49?

It is owned by the State Highway Agency.