US Bridges

I-520 over Savannah River

Good

Aiken County, South Carolina · Sc/Georgia Line · Structure no. 000000000009854

Built
2004
21 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,891 ft
14 main spans
Daily traffic
19,200
2023 count
Owner
State
State Highway Agency

About this bridge

I-520 over Savannah River is a prestressed concrete continuous stringer/multi-beam or girder carrying I-520 over Savannah River 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 29,568 by 2043. The structure is 1,891 ft (576.3 m) long and 89 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesI-520
CrossesSavannah River
LocationSc/Georgia Line
RouteInterstate 520
Coordinates33.46303, -81.92541
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating29.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans14
Design loadHS 25 or greater
Structure length1,891 ft (576.3 m)
Longest span139 ft (42.4 m)
Deck width89 ft (27.2 m)
Roadway width84 ft (25.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,200 (2023)
Projected traffic29,568 by 2043
Trucks16%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I-520 over Savannah River built?

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

What condition is I-520 over Savannah River 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 Savannah River carry?

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

How long is I-520 over Savannah River?

The structure is 1,891 ft (576.3 m) long with a longest span of 139 ft (42.4 m) and a deck 89 ft wide.

Who owns I-520 over Savannah River?

It is owned by the State Highway Agency.