Chester County Bridge Report Card
Chester County scores 53 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Chester County, South Carolina
Chester County has 191 bridges in the National Bridge Inventory, with 20 rated poor and 44 rated scour-critical. Its poor-condition share of 10.5% is above the 6.3% statewide average. Poor-condition bridges carry about 44,400 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Chester County a Bridge Condition Exposure Score of 53/100 (F). The county has 191 bridges in the National Bridge Inventory, including 20 in poor condition and 44 rated scour-critical. Poor-condition bridges carry about 44,400 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 10.5% | 20.9 |
| Poor-condition traffic exposure | 25 | 7.4% of measured traffic | 5.5 |
| Scour-critical bridge share | 20 | 23.0% | 20.0 |
| Average age vs national baseline | 10 | 49 years vs 48 nationally | 0.5 |
| Traffic-data completeness | 5 | 602,550 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 10.5% |
| State Poor-Condition Share | 6.3% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 23.0% |
| Average Bridge Age | 49 years |
| Poor-Condition Traffic Exposure | 44,400 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Chester County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| S-12-557 over Rocky Creek | Poor condition + traffic exposure | Poor | 800 | 1968 |
| S-12-462 over Trib To Sandy River | Poor condition + traffic exposure | Poor | 350 | 1963 |
| S-12-50 over Trib To Fishing CR | Poor condition + traffic exposure | Poor | 200 | 1963 |
| S-12-525 over Whitesides Branch | Poor condition + traffic exposure | Poor | 150 | 1967 |
| S-12-461 over Bear Owens Branch | Poor condition + traffic exposure | Poor | 125 | 1963 |
| S-12-143 over Bells Creek | Poor condition + traffic exposure | Poor | 125 | 1978 |
| S-12-496 over South Fork Creek | Poor condition + traffic exposure | Poor | 100 | 1965 |
| S-12-355 over Trib To Little Rocky CR | Poor condition + traffic exposure | Poor | 50 | 1967 |
| S-12-42 over Sandy River | Poor condition + traffic exposure | Poor | 50 | 1970 |
| I-77 NB over Rocky Creek | Poor condition + traffic exposure | Poor | 24,350 | 1979 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.