Bridge conditions in Colleton County, South Carolina
231 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 231 bridges in Colleton County: 76 rated good, 149 fair, and 6 poor.
- 6 of the 231 bridges in Colleton County, South Carolina, are rated in poor condition (2.6%) in the 2025 National Bridge Inventory, as of .
- 76 bridges (32.9%) are rated good and 149 (64.5%) fair.
- The median Colleton County bridge was built in 1968.
- The busiest poor-rated bridge is US 17 over Edisto River (built 1953), carrying about 19,300 vehicles a day.
Good 32.9% · Fair 64.5% · Poor 2.6% of 231 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 |
|---|---|---|---|
| US 17 over Edisto River | 1953 | 19,300 | Poor |
| Sc 64/BELLS Hwy over Buckhead Creek Trib | 1931 | 2,900 | Poor |
| US 17 Alt over Combahee River | 1940 | 1,350 | Poor |
| US 21 over Buckhead Creek (2) | 1955 | 1,250 | Poor |
| S-15-64 over Indian Creek | 1958 | 950 | Poor |
| S-15-41/riter Rd over Ashepoo River | 1956 | 850 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-95 NB over Combahee River | 1970 | 26,000 | Fair |
| I-95 NB over Combahee Swamp | 1970 | 26,000 | Fair |
| I-95 SB over Combahee River | 1970 | 26,000 | Fair |
| I-95 SB over Combahee Swamp | 1970 | 26,000 | Fair |
| I-95 NB over Great Swamp | 1972 | 24,700 | Fair |
| I-95 NB over S.c.l. Railroad | 1972 | 24,700 | Fair |
| I-95 NB over Sc 64 | 1972 | 24,700 | Fair |
| I-95 NB over S-15-34 | 1972 | 24,700 | Fair |
| I-95 NB over Allen Creek | 1972 | 24,700 | Good |
| I-95 SB over Great Swamp | 1972 | 24,700 | 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.