US Bridges

S-4-1156 over I-85 Overpass

Fair

Anderson County, South Carolina · 18.4 MI NE of Anderson · Structure no. 000000000008131

Built
1988
37 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
266 ft
2 main spans
Daily traffic
550
2023 count
Owner
State
State Highway Agency

About this bridge

S-4-1156 over I-85 Overpass is a steel continuous stringer/multi-beam or girder carrying S-4-1156 over I-85 Overpass in Anderson County, South Carolina. It was built in 1988, so it is 37 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 550 vehicles a day, roughly 5% of them trucks, projected to reach 704 by 2043. The structure is 266 ft (81.2 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesS-4-1156
CrossesI-85 Overpass
Location18.4 MI NE of Anderson
RouteState Highway 1156
Coordinates34.74156, -82.48409
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating44 US tons
Inventory rating33.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length266 ft (81.2 m)
Longest span133 ft (40.5 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic550 (2023)
Projected traffic704 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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-4-1156 over I-85 Overpass built?

It was built in 1988, making it 37 years old in 2025.

What condition is S-4-1156 over I-85 Overpass in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2025.

How much traffic does S-4-1156 over I-85 Overpass carry?

About 550 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-4-1156 over I-85 Overpass?

The structure is 266 ft (81.2 m) long with a longest span of 133 ft (40.5 m) and a deck 37 ft wide.

Who owns S-4-1156 over I-85 Overpass?

It is owned by the State Highway Agency.