US Bridges

I-20 over Savannah River

Good

Aiken County, South Carolina · Ga/Sc State Line · Structure no. 000000000010733

Built
2021
4 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,278 ft
9 main spans
Daily traffic
64,300
2023 count
Owner
State
State Highway Agency

About this bridge

I-20 over Savannah River is a prestressed concrete stringer/multi-beam or girder carrying I-20 over Savannah River in Aiken County, South Carolina. It was built in 2021, so it is 4 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 64,300 vehicles a day, roughly 12% of them trucks, projected to reach 102,880 by 2043. The structure is 1,278 ft (389.5 m) long and 75 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesI-20
CrossesSavannah River
LocationGa/Sc State Line
RouteInterstate 20
Coordinates33.5316, -82.01227
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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating45.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9 (+9 approach)
Design loadHS 20 + Mod
Structure length1,278 ft (389.5 m)
Longest span142 ft (43.3 m)
Deck width75 ft (22.9 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,300 (2023)
Projected traffic102,880 by 2043
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$170,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-20 over Savannah River built?

It was built in 2021, making it 4 years old in 2025.

What condition is I-20 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 October 2023.

How much traffic does I-20 over Savannah River carry?

About 64,300 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is I-20 over Savannah River?

The structure is 1,278 ft (389.5 m) long with a longest span of 142 ft (43.3 m) and a deck 75 ft wide.

Who owns I-20 over Savannah River?

It is owned by the State Highway Agency.