SR 21 over Relief Slough
GoodScott County, Mississippi · 11.3 MI N SR 35 · Structure no. 310002106201220
- Built
- 1981
- 44 years old
- Condition
- Good
- inspected December 2024
- Type
- Culvert
- Concrete
- Length
- 30 ft
- 2 main spans
- Daily traffic
- 3,900
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 21 over Relief Slough is a concrete culvert carrying SR 21 over Relief Slough in Scott County, Mississippi. It was built in 1981, so it is 44 years old, older than the Mississippi average of 38.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 3,900 vehicles a day, roughly 14% of them trucks, projected to reach 4,500 by 2043. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 44.7 mi (72 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 21 over Relief Slough built?
It was built in 1981, making it 44 years old in 2025.
What condition is SR 21 over Relief Slough 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 2024.
How much traffic does SR 21 over Relief Slough carry?
About 3,900 vehicles per day (2023 count), of which roughly 14% are trucks.
How long is SR 21 over Relief Slough?
The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.3 m).
Who owns SR 21 over Relief Slough?
It is owned by the State Highway Agency.