US Bridges

I-185 Nbl over Sc 20

Good

Greenville County, South Carolina · South of Greenville · Structure no. 000000000009608

Built
2000
25 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
185 ft
3 main spans
Daily traffic
4,050
2023 count
Owner
State
State Highway Agency

About this bridge

I-185 Nbl over Sc 20 is a prestressed concrete stringer/multi-beam or girder carrying I-185 Nbl over Sc 20 in Greenville County, South Carolina. It was built in 2000, so it is 25 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 4,050 vehicles a day, roughly 9% of them trucks, projected to reach 5,792 by 2043. The structure is 185 ft (56.4 m) long and 64 ft wide.

CarriesI-185 Nbl
CrossesSc 20
LocationSouth of Greenville
RouteInterstate 185
Coordinates34.74181, -82.43604
Functional classUrban Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating34.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length185 ft (56.4 m)
Longest span98 ft (30 m)
Deck width64 ft (19.6 m)
Roadway width61 ft (18.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,050 (2023)
Projected traffic5,792 by 2043
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a toll 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-185 Nbl over Sc 20 built?

It was built in 2000, making it 25 years old in 2025.

What condition is I-185 Nbl over Sc 20 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 July 2024.

How much traffic does I-185 Nbl over Sc 20 carry?

About 4,050 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-185 Nbl over Sc 20?

The structure is 185 ft (56.4 m) long with a longest span of 98 ft (30 m) and a deck 64 ft wide.

Who owns I-185 Nbl over Sc 20?

It is owned by the State Highway Agency.