US Bridges

I-85 over County Road under I-85

Fair

Anderson County, South Carolina · 5.2MI NW of Williamston · Structure no. 000000000004017

Built
1963
62 years old
Condition
Fair
inspected September 2024
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
70,200
2023 count
Owner
State
State Highway Agency

About this bridge

I-85 over County Road under I-85 is a concrete frame carrying I-85 over County Road under I-85 in Anderson County, South Carolina. It was built in 1963, so it is 62 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 70,200 vehicles a day, roughly 25% of them trucks. The structure is 26 ft (7.9 m) long and 141 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI-85
CrossesCounty Road under I-85
Location5.2MI NW of Williamston
RouteInterstate 85
CountyAnderson County
StateSouth Carolina
Coordinates34.68419, -82.51688
Functional classRural Principal Arterial - Interstate

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.3 US tons
Inventory rating68.9 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width141 ft (42.9 m)
Roadway width136 ft (41.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70,200 (2023)
Projected traffic—
Trucks25%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$495,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-85 over County Road under I-85 built?

It was built in 1963, making it 62 years old in 2025.

What condition is I-85 over County Road under 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 September 2024.

How much traffic does I-85 over County Road under I-85 carry?

About 70,200 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is I-85 over County Road under I-85?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 141 ft wide.

Who owns I-85 over County Road under I-85?

It is owned by the State Highway Agency.