SR 18 over Leaf River
GoodSmith County, Mississippi · 1.6 MI W SR 501 · Structure no. 310001806511460
- Built
- 1970
- 55 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 490 ft
- 1 main span
- Daily traffic
- 3,300
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 18 over Leaf River is a prestressed concrete stringer/multi-beam or girder carrying SR 18 over Leaf River in Smith County, Mississippi. It was built in 1970, so it is 55 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 3,300 vehicles a day, roughly 22% of them trucks, projected to reach 3,300 by 2043. The structure is 490 ft (149.4 m) long and 42 ft wide. If it were closed, the detour would be 36 mi (58 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 18 over Leaf River built?
It was built in 1970, making it 55 years old in 2025.
What condition is SR 18 over Leaf River 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 September 2023.
How much traffic does SR 18 over Leaf River carry?
About 3,300 vehicles per day (2023 count), of which roughly 22% are trucks.
How long is SR 18 over Leaf River?
The structure is 490 ft (149.4 m) long with a longest span of 90 ft (27.4 m) and a deck 42 ft wide.
Who owns SR 18 over Leaf River?
It is owned by the State Highway Agency.