US Bridges

S-4-71 over Over I-85

Fair

Anderson County, South Carolina · 8.1 MI NW Anderson · Structure no. 000000000003578

Built
1961
64 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
210 ft
4 main spans
Daily traffic
3,200
2023 count
Owner
State
State Highway Agency

About this bridge

S-4-71 over Over I-85 is a prestressed concrete stringer/multi-beam or girder carrying S-4-71 over Over I-85 in Anderson County, South Carolina. It was built in 1961, so it is 64 years old, older 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 3,200 vehicles a day, roughly 6% of them trucks, projected to reach 3,936 by 2043. The structure is 210 ft (64 m) long and 30 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesS-4-71
CrossesOver I-85
Location8.1 MI NW Anderson
RouteState Highway 71
CountyAnderson County
StateSouth Carolina
Coordinates34.55753, -82.77513
Functional classUrban Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length210 ft (64 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2023)
Projected traffic3,936 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$504,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was S-4-71 over Over I-85 built?

It was built in 1961, making it 64 years old in 2025.

What condition is S-4-71 over Over I-85 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 January 2025.

How much traffic does S-4-71 over Over I-85 carry?

About 3,200 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is S-4-71 over Over I-85?

The structure is 210 ft (64 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns S-4-71 over Over I-85?

It is owned by the State Highway Agency.