S-12-839 over Trib to Rocky CR
Chester County, South Carolina · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S-12-839 over Trib to Rocky CR in Chester County, South Carolina, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 2004, making it 21 years old at the 2025 inventory.
- It carries about 125 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 68 of the 191 inventoried bridges in Chester County rated good (35.6%); 20 (10.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: substructure 8 to 7.
- Its most recent inspection on record is dated December 2024, on a 24-month routine inspection cycle.
- 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 → (34.64907, -81.07282)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete slab |
| Length | about 149 ft |
| Location | 8.9MI SE Chester |
| NBI structure number | 000000000004078 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Chester County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-77 NB over Scl Railroad | 1978 | 28,150 | Fair |
| I-77 SB over Scl Railroad | 1978 | 28,150 | Fair |
| I-77 NB over S. Fork Fishing Ck | 1979 | 28,150 | Fair |
| I-77 Nbl over Fishing Creek | 1979 | 28,150 | Fair |
| I-77 SB over S. Fork Fishing Ck | 1979 | 28,150 | Fair |
| I-77 Sbl over Fishing Creek | 1979 | 28,150 | Fair |
All bridges nearby: Chester County, SC bridge conditions · every bridge in Chester County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.