US 21 over RR CSXT & RR NS
GoodRichland County, South Carolina · City of Columbia · Structure no. 000000000008033
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 156 ft
- 1 main span
- Daily traffic
- 40,300
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 21 over RR CSXT & RR NS is a steel stringer/multi-beam or girder carrying US 21 over RR CSXT & RR NS in Richland County, South Carolina. It was built in 1986, so it is 39 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 40,300 vehicles a day, roughly 3% of them trucks, projected to reach 63,271 by 2043. The structure is 156 ft (47.5 m) long and 150 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 21 over RR CSXT & RR NS built?
It was built in 1986, making it 39 years old in 2025.
What condition is US 21 over RR CSXT & RR NS 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 December 2023.
How much traffic does US 21 over RR CSXT & RR NS carry?
About 40,300 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is US 21 over RR CSXT & RR NS?
The structure is 156 ft (47.5 m) long with a longest span of 82 ft (25 m) and a deck 150 ft wide.
Who owns US 21 over RR CSXT & RR NS?
It is owned by the State Highway Agency.