SR 18 over Unnamed Stream
Smith County, Mississippi · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 18 over Unnamed Stream in Smith County, Mississippi, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1970, making it 55 years old at the 2025 inventory.
- It carries about 3,300 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 135 of the 175 inventoried bridges in Smith County rated good (77.1%); 7 (4.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (32.01243, -89.40346)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 39 ft |
| Location | 0.1 Mi E SR 501 |
| NBI structure number | 310001806511640 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Mississippi department of transportation.
Busiest bridges in Smith County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 28 over Leaf River | 1973 | 5,800 | Fair |
| SR 28 over Relief | 1999 | 5,800 | Good |
| SR 28 over Oakahay Creek | 1973 | 5,100 | Good |
| SR 28 over Mill Creek | 1973 | 5,100 | Good |
| SR 28 over Bog Branch | 1973 | 5,100 | Good |
| SR 28 over Big Creek | 1999 | 4,100 | Good |
All bridges nearby: Smith County, MS bridge conditions · every bridge in Smith County · Mississippi bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.