US Bridges

S-42-12 over I-85

Good

Spartanburg County, South Carolina · 4.0 MI S Greer · Structure no. 000000000003109

Built
2006
19 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
244 ft
2 main spans
Daily traffic
6,500
2023 count
Owner
State
State Highway Agency

About this bridge

S-42-12 over I-85 is a prestressed concrete continuous stringer/multi-beam or girder carrying S-42-12 over I-85 in Spartanburg County, South Carolina. It was built in 2006, so it is 19 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 6,500 vehicles a day, roughly 8% of them trucks, projected to reach 9,750 by 2043. The structure is 244 ft (74.4 m) long and 62 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-42-12
CrossesI-85
Location4.0 MI S Greer
RouteState Highway 12
Coordinates34.88475, -82.19544
Functional classUrban 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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.1 US tons
Inventory rating19.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length244 ft (74.4 m)
Longest span134 ft (40.8 m)
Deck width62 ft (18.9 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,500 (2023)
Projected traffic9,750 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$9,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was S-42-12 over I-85 built?

It was built in 2006, making it 19 years old in 2025.

What condition is S-42-12 over I-85 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 May 2023.

How much traffic does S-42-12 over I-85 carry?

About 6,500 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S-42-12 over I-85?

The structure is 244 ft (74.4 m) long with a longest span of 134 ft (40.8 m) and a deck 62 ft wide.

Who owns S-42-12 over I-85?

It is owned by the State Highway Agency.