S-1178 over U.S. 29
Anderson County, South Carolina · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S-1178 over U.S. 29 in Anderson 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 1957, making it 68 years old at the 2025 inventory.
- It carries about 175 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 19 of the 462 inventoried bridges in Anderson County rated poor (4.1%); 19 (4.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: deck 5 to 6, substructure 6 to 7.
- Its most recent inspection on record is dated August 2024, 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 → (34.63292, -82.52958)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 6 | Satisfactory condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 6 | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 220 ft |
| Location | 3.0 Mi NW Williamston |
| NBI structure number | 000000000002468 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Anderson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-85 over Big Beaver Dam Creek | 1963 | 70,400 | Fair |
| I-85 over County Road Under I-85 | 1963 | 70,200 | Fair |
| I-85 over Six & Twenty Creek | 2002 | 63,800 | Fair |
| I-85 NB over Hurricane Creek | 1962 | 54,300 | Fair |
| I-85 NB over Steel Creek | 1962 | 50,300 | Fair |
| I-85 NB over Little Beaverdam Creek | 1961 | 45,900 | Fair |
All bridges nearby: Anderson County, SC bridge conditions · every bridge in Anderson County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.