US Bridges

Sc 12 Spur over I-77

Good

Richland County, South Carolina · 2 MI E of Forest Acres · Structure no. 000000000008294

Built
1989
36 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
250 ft
2 main spans
Daily traffic
24,400
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 12 Spur over I-77 is a steel continuous stringer/multi-beam or girder carrying Sc 12 Spur over I-77 in Richland County, South Carolina. It was built in 1989, so it is 36 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 24,400 vehicles a day, roughly 2% of them trucks, projected to reach 38,308 by 2043. The structure is 250 ft (76.2 m) long and 102 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSc 12 Spur
CrossesI-77
Location2 MI E of Forest Acres
RouteState Highway 12
CountyRichland County
StateSouth Carolina
Coordinates34.02167, -80.94611
Functional classUrban Other Principal Arterial

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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating21.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length250 ft (76.2 m)
Longest span86 ft (26.2 m)
Deck width102 ft (31.1 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,400 (2023)
Projected traffic38,308 by 2043
Trucks2%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sc 12 Spur over I-77 built?

It was built in 1989, making it 36 years old in 2025.

What condition is Sc 12 Spur over I-77 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 Sc 12 Spur over I-77 carry?

About 24,400 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Sc 12 Spur over I-77?

The structure is 250 ft (76.2 m) long with a longest span of 86 ft (26.2 m) and a deck 102 ft wide.

Who owns Sc 12 Spur over I-77?

It is owned by the State Highway Agency.