US Bridges

I-520 RAMPTOI-20W over I-20

Good

Aiken County, South Carolina · North Augusta · Structure no. 000000000009921

Built
2008
17 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
333 ft
2 main spans
Daily traffic
2,200
2023 count
Owner
State
State Highway Agency

About this bridge

I-520 RAMPTOI-20W over I-20 is a steel continuous stringer/multi-beam or girder carrying I-520 RAMPTOI-20W over I-20 in Aiken County, South Carolina. It was built in 2008, so it is 17 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,200 vehicles a day, roughly 9% of them trucks, projected to reach 4,544 by 2042. The structure is 333 ft (101.5 m) long and 39 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesI-520 RAMPTOI-20W
CrossesI-20
LocationNorth Augusta
RouteInterstate 520
CountyAiken County
StateSouth Carolina
Coordinates33.56731, -81.928
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85.8 US tons
Inventory rating58.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length333 ft (101.5 m)
Longest span179 ft (54.6 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2023)
Projected traffic4,544 by 2042
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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-520 RAMPTOI-20W over I-20 built?

It was built in 2008, making it 17 years old in 2025.

What condition is I-520 RAMPTOI-20W over I-20 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does I-520 RAMPTOI-20W over I-20 carry?

About 2,200 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-520 RAMPTOI-20W over I-20?

The structure is 333 ft (101.5 m) long with a longest span of 179 ft (54.6 m) and a deck 39 ft wide.

Who owns I-520 RAMPTOI-20W over I-20?

It is owned by the State Highway Agency.