US 378 over Mountain Creek
Edgefield County, South Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 378 over Mountain Creek in Edgefield County, South Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1940 and reconstructed in 1959, making it 85 years old at the 2025 inventory.
- It carries about 1,050 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 72 of the 122 inventoried bridges in Edgefield County rated fair (59.0%); 5 (4.1%) 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 → (33.92861, -82.02469)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 125 ft |
| Location | 10.9 Mi NW of Edgefield |
| NBI structure number | 000000000001033 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Edgefield County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 25 over Beaverdam Ck Overflow | 1915 | 7,000 | Fair |
| US 25 over Beaverdam Creek | 1925 | 7,000 | Good |
| Sc 121 over C S X Railroad | 1982 | 5,000 | Good |
| Sc 121 over Shaw Creek | 1982 | 5,000 | Fair |
| Sc 19 over C S X Railroad | 1955 | 4,400 | Fair |
| S-19-10 over Beaverdam Creek | 1969 | 3,300 | Fair |
All bridges nearby: Edgefield County, SC bridge conditions · every bridge in Edgefield County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.