Bridge conditions in Marion County, South Carolina
112 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 112 bridges in Marion County: 38 rated good, 64 fair, and 10 poor.
- 10 of the 112 bridges in Marion County, South Carolina, are rated in poor condition (8.9%) in the 2025 National Bridge Inventory, as of .
- 38 bridges (33.9%) are rated good and 64 (57.1%) fair.
- The median Marion County bridge was built in 1974.
- The busiest poor-rated bridge is Sc 576 over Catfish Canal (built 1971), carrying about 11,900 vehicles a day.
Good 33.9% · Fair 57.1% · Poor 8.9% of 112 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 |
|---|---|---|---|
| Sc 576 over Catfish Canal | 1971 | 11,900 | Poor |
| US 501 Sbl over Little Pee Dee Swp-4 | 1974 | 9,950 | Poor |
| US 76 over Catfish Branch | 1941 | 5,900 | Poor |
| US 76 over Catfish Branch | 1941 | 5,900 | Poor |
| US 301 over Agnay Swamp | 1930 | 3,000 | Poor |
| Sc 41 over Back Swamp | 1930 | 2,800 | Poor |
| US 76 over Little Pee Dee River | 1926 | 2,600 | Poor |
| US 76 over Price Swamp | 1926 | 2,300 | Poor |
| S-34-32 over Reedy Creek | 1977 | 1,300 | Poor |
| S-34-64 over Pitch Pot Swamp | 1967 | 200 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 501 over Reedy Creek | 1944 | 16,000 | Fair |
| US 501 over S.c.l. Railroad | 1936 | 16,000 | Fair |
| Sc 576 over Catfish Canal | 1971 | 11,900 | Poor |
| US 76 EB over Great Pee Dee River | 1962 | 11,450 | Fair |
| US 76 WB over Great Pee Dee River | 1992 | 11,450 | Fair |
| US 76 over Smith Branch | 1925 | 11,400 | Fair |
| US 76 WB over Tobys Creek | 1950 | 11,200 | Fair |
| US 76 EB over Tobys Creek | 1973 | 11,200 | Fair |
| US 501 over US 501 Bus | 1988 | 10,000 | Good |
| US 501 SB over Little Pee Dee Swp-1 | 1931 | 9,950 | 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.