US Bridges

S-4-75 over US 29

Good

Anderson County, South Carolina · 12 M NE of Anderson · Structure no. 000000000010373

Built
2023
2 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
146 ft
1 main span
Daily traffic
700
2023 count
Owner
State
State Highway Agency

About this bridge

S-4-75 over US 29 is a prestressed concrete stringer/multi-beam or girder carrying S-4-75 over US 29 in Anderson County, South Carolina. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 700 vehicles a day, roughly 25% of them trucks, projected to reach 861 by 2043. The structure is 146 ft (44.5 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesS-4-75
CrossesUS 29
Location12 M NE of Anderson
RouteState Highway 75
Coordinates34.64, -82.52639
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation9: Superior to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating77.5 US tons
Inventory rating39.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length146 ft (44.5 m)
Longest span146 ft (44.5 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2023)
Projected traffic861 by 2043
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 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-4-75 over US 29 built?

It was built in 2023, making it 2 years old in 2025.

What condition is S-4-75 over US 29 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-4-75 over US 29 carry?

About 700 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is S-4-75 over US 29?

The structure is 146 ft (44.5 m) long with a longest span of 146 ft (44.5 m) and a deck 43 ft wide.

Who owns S-4-75 over US 29?

It is owned by the State Highway Agency.