Sc 18 over B.u.c. Railroad
Union County, South Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sc 18 over B.u.c. Railroad in Union County, South Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1936, making it 89 years old at the 2025 inventory.
- It carries about 4,700 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 63 of the 132 inventoried bridges in Union County rated fair (47.7%); 21 (15.9%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (34.72014, -81.62515)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 89 ft |
| Location | City of Union |
| NBI structure number | 000000000000754 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Union County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 176 EB over Rocky Creek | 1987 | 4,600 | Fair |
| US 176 WB over Rocky Creek | 1987 | 4,600 | Fair |
| Sc 215 over Buffalo Creek | 1924 | 4,100 | Fair |
| Sc 49 over Shoals Creek | 1931 | 3,800 | Fair |
| Sc 72 over Cox Creek | 1929 | 3,300 | Fair |
| S-44-383 over Meng Creek | 1981 | 3,300 | Fair |
All bridges nearby: Union County, SC bridge conditions · every bridge in Union County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.