Sc 421 over Little Horse Creek
Aiken County, South Carolina · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sc 421 over Little Horse Creek in Aiken County, South Carolina, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1926 and reconstructed in 1972, making it 99 years old at the 2025 inventory.
- It carries about 9,000 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 20 of the 198 inventoried bridges in Aiken County rated poor (10.1%); 20 (10.1%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated February 2025, on a 12-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (33.49847, -81.88868)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 64 ft |
| Location | 1 Mi E of Clearwater |
| NBI structure number | 000000000002447 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | February 2025 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Aiken County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-20 over Savannah River | 2021 | 64,300 | Good |
| I-20 over Fox Creek | 1966 | 50,200 | Fair |
| I-20 over High Tower Branch | 1966 | 44,500 | Fair |
| I-20 over Horse Creek | 1966 | 44,500 | Fair |
| US 25 over I-20 | 2009 | 37,300 | Good |
| US 1 over Southern RR (no 1) | 1952 | 27,000 | Fair |
All bridges nearby: Aiken County, SC bridge conditions · every bridge in Aiken County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.