US Bridges

I-520 over Southern RR

Good

Aiken County, South Carolina · North Augusta · Structure no. 000000000009846

Built
2004
21 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
198 ft
1 main span
Daily traffic
19,200
2023 count
Owner
State
State Highway Agency

About this bridge

I-520 over Southern RR is a steel stringer/multi-beam or girder carrying I-520 over Southern RR in Aiken County, South Carolina. It was built in 2004, so it is 21 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 19,200 vehicles a day, roughly 16% of them trucks, projected to reach 23,616 by 2043. The structure is 198 ft (60.4 m) long and 105 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesI-520
CrossesSouthern RR
LocationNorth Augusta
RouteInterstate 520
Coordinates33.47388, -81.92714
Functional classRural 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.
Substructure8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.5 US tons
Inventory rating39.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length198 ft (60.4 m)
Longest span198 ft (60.4 m)
Deck width105 ft (32 m)
Roadway width99 ft (30.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,200 (2023)
Projected traffic23,616 by 2043
Trucks16%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.1 mi (5 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 over Southern RR built?

It was built in 2004, making it 21 years old in 2025.

What condition is I-520 over Southern RR 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 over Southern RR carry?

About 19,200 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is I-520 over Southern RR?

The structure is 198 ft (60.4 m) long with a longest span of 198 ft (60.4 m) and a deck 105 ft wide.

Who owns I-520 over Southern RR?

It is owned by the State Highway Agency.