US Bridges

S-2-780 over I-20

Good

Aiken County, South Carolina · 4.0 MI NW Granitville · Structure no. 000000000005451

Built
1969
56 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
258 ft
4 main spans
Daily traffic
425
2023 count
Owner
State
State Highway Agency

About this bridge

S-2-780 over I-20 is a steel stringer/multi-beam or girder carrying S-2-780 over I-20 in Aiken County, South Carolina. It was built in 1969, so it is 56 years old, older 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 425 vehicles a day, roughly 5% of them trucks, projected to reach 544 by 2043. The structure is 258 ft (78.6 m) long and 37 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesS-2-780
CrossesI-20
Location4.0 MI NW Granitville
RouteState Highway 780
Coordinates33.60143, -81.86273
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum 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 spans4
Design loadHS 15
Structure length258 ft (78.6 m)
Longest span86 ft (26.2 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic425 (2023)
Projected traffic544 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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 S-2-780 over I-20 built?

It was built in 1969, making it 56 years old in 2025.

What condition is S-2-780 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 2025.

How much traffic does S-2-780 over I-20 carry?

About 425 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-2-780 over I-20?

The structure is 258 ft (78.6 m) long with a longest span of 86 ft (26.2 m) and a deck 37 ft wide.

Who owns S-2-780 over I-20?

It is owned by the State Highway Agency.