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Infrastructure Grade
Infrastructure Report Card
6.3% of bridges in poor condition
Total Bridges
9,504
Poor Condition
602(6.3%)
Avg Bridge Age
49 yrs
Trend
Declining
| Metric | South Carolina | National Avg | Trend |
|---|---|---|---|
| % Poor Condition | 6.3% | 6.7% | Declining |
| vs. National Average | -0.4 pts | -- | -- |
| Average Bridge Age | 49 yrs | 48 yrs | -- |
| Good or Better | 4,301(45.3%) | -- | -- |
Grade Scale
Percentage of bridges in poor condition over time. The dashed line shows the national average for comparison.
Total Bridges
9,504
Poor Condition
602(6.3%)
Average Age
49 yrs
Daily Crossings
56.4M
Good or Better
4,301(45.3%)
These bridges have at least one major component rated "5" (Fair) — one step above the poor threshold. Sorted by daily traffic to highlight highest-impact structures at risk.
| Bridge | Location | Deck | Super | Sub | Daily Traffic |
|---|---|---|---|---|---|
| I-26 | Charleston County | 5 | 6 | 6 | 170,100 |
| I-77 | York County | 5 | 7 | 7 | 130,800 |
| I-26/RAMP OFF I-26 | Richland County | 7 | 5 | 7 | 130,700 |
| I-77 | York County | 5 | 7 | 6 | 125,800 |
| I-77 | York County | 5 | 7 | 7 | 124,700 |
| I-20 | Richland County | 7 | 5 | 7 | 105,700 |
| I-26 | Charleston County | 5 | 5 | 5 | 93,200 |
| I-26 EB | Charleston County | 6 | 5 | 6 | 93,200 |
| I-26 | Lexington County | 6 | 5 | 5 | 93,100 |
| I-77 | York County | 5 | 5 | 6 | 92,100 |
| I-26 | Lexington County | 6 | 5 | 6 | 90,900 |
| I-26 | Charleston County | 5 | 6 | 5 | 90,000 |
| I-26 | Lexington County | 7 | 5 | 7 | 87,500 |
| I-26 | Charleston County | 6 | 5 | 6 | 85,050 |
| I-77 | York County | 5 | 7 | 6 | 76,400 |
The 10 bridges in poorest condition, ranked by lowest sufficiency rating.
over TRIB ROCKY BOTTOM CREEK
over SOUTHERN RAILROAD
over BR TO CEDAR CREEK
over NORTH RABON CREEK
over LONG BRANCH
over SOUTH RABON CREEK
over TRIB TO CANNONS CREEK
over LONG CANE CREEK
over JOHNS CREEK
over NORFOLK SOUTHERN
States with similar infrastructure profiles, ranked by percentage of bridges in poor condition.
Grading: Grades are based on the percentage of bridges classified as "poor condition." A bridge is in poor condition when at least one major component (deck, superstructure, or substructure) is rated 4 or below on the NBI 0-9 scale.
Data Source: Federal Highway Administration (FHWA) National Bridge Inventory (NBI). Data is updated annually. BridgeStats is not affiliated with or endorsed by the FHWA.
Watchlist Criteria: Bridges with any component rated "5" (Fair) are one step from the poor threshold of 4 and are flagged for monitoring. These bridges are not yet in poor condition but may deteriorate without maintenance.