US Bridges

S-4-279 over Eighteen Mile Creek

Good

Anderson County, South Carolina · 12.5 Miles NW Anderson · Structure no. 000000000002122

Built
2003
22 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
160 ft
3 main spans
Daily traffic
275
2023 count
Owner
State
State Highway Agency

About this bridge

S-4-279 over Eighteen Mile Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying S-4-279 over Eighteen Mile Creek in Anderson County, South Carolina. It was built in 2003, so it is 22 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 275 vehicles a day, roughly 8% of them trucks, projected to reach 503 by 2043. The structure is 160 ft (48.8 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-4-279
CrossesEighteen Mile Creek
Location12.5 Miles NW Anderson
RouteState Highway 279
Coordinates34.63643, -82.80429
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating39.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length160 ft (48.8 m)
Longest span70 ft (21.3 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2023)
Projected traffic503 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-4-279 over Eighteen Mile Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is S-4-279 over Eighteen Mile Creek 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 December 2024.

How much traffic does S-4-279 over Eighteen Mile Creek carry?

About 275 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S-4-279 over Eighteen Mile Creek?

The structure is 160 ft (48.8 m) long with a longest span of 70 ft (21.3 m) and a deck 37 ft wide.

Who owns S-4-279 over Eighteen Mile Creek?

It is owned by the State Highway Agency.