Bridge conditions in Chester County, South Carolina
191 inventoried bridges · 20 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 10 bridges in Chester County is rated in poor condition: 20 of 191 on the federal inventory, one of the higher shares in South Carolina.
- 20 of the 191 bridges in Chester County, South Carolina, are rated in poor condition (10.5%) in the 2025 National Bridge Inventory, as of .
- 68 bridges (35.6%) are rated good and 103 (53.9%) fair.
- The median Chester County bridge was built in 1979.
- The busiest poor-rated bridge is I-77 NB over Rocky Creek (built 1979), carrying about 24,350 vehicles a day.
Good 35.6% · Fair 53.9% · Poor 10.5% of 191 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-77 NB over Rocky Creek | 1979 | 24,350 | Poor |
| Sc 72 over South Fork Creek | 1929 | 6,100 | Poor |
| US 21 over Rocky Creek | 1938 | 4,700 | Poor |
| US 21 over Fishing Creek | 1937 | 4,600 | Poor |
| S-12-482 over Tan Yard Branch | 1973 | 850 | Poor |
| S-12-557 over Rocky Creek | 1968 | 800 | Poor |
| S-12-778 over Unnamed Stream | 1982 | 600 | Poor |
| S-12-152 over US 321 By Pass | 1960 | 550 | Poor |
| S-12-462 over Trib to Sandy River | 1963 | 350 | Poor |
| S-12-462 over Sandy River | 1973 | 350 | Poor |
| S-12-50 over Trib to Fishing CR | 1963 | 200 | Poor |
| S-12-50 over Trib to Fishing Creek | 1977 | 200 | Poor |
| S-12-525 over Whitesides Branch | 1967 | 150 | Poor |
| S-12-461 over Bear Owens Branch | 1963 | 125 | Poor |
| S-12-540 over Trib to Dry Fork Creek | 1966 | 125 | Poor |
| S-12-143 over Bells Creek | 1978 | 125 | Poor |
| S-12-496 over South Fork Creek | 1965 | 100 | Poor |
| S-12-355 over Trib to Little Rocky CR | 1967 | 50 | Poor |
| S-12-42 over Sandy River | 1970 | 50 | Poor |
| S-12-727 over Susybole Creek | 1976 | 25 | Poor |
Busiest bridges in the 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 |
| I-77 NB over S-12-56 | 1978 | 24,450 | Fair |
| I-77 SB over S-12-56 | 1978 | 24,450 | Fair |
| I-77 NB over RR Lc | 1979 | 24,450 | Fair |
| I-77 SB over RR Lc | 1979 | 24,450 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of South Carolina: South Carolina bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.