Bridge conditions in Marlboro County, South Carolina
97 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Marlboro County tracks close to typical: 7 of its 97 inventoried bridges (7.2%) are rated poor, against a national rate of about 7%.
- 7 of the 97 bridges in Marlboro County, South Carolina, are rated in poor condition (7.2%) in the 2025 National Bridge Inventory, as of .
- 35 bridges (36.1%) are rated good and 55 (56.7%) fair.
- The median Marlboro County bridge was built in 1969.
- The busiest poor-rated bridge is Sc 9 Bus over Crooked Creek (built 1921), carrying about 10,100 vehicles a day.
Good 36.1% · Fair 56.7% · Poor 7.2% of 97 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 9 Bus over Crooked Creek | 1921 | 10,100 | Poor |
| Sc 9 over Phillis Creek | 1932 | 8,300 | Poor |
| US 15 over Panther Creek | 1925 | 7,600 | Poor |
| US 1 NB over Great Pee Dee River | 1962 | 7,400 | Poor |
| Sc 9 SB over Naked Creek | 1975 | 4,150 | Poor |
| Sc 83 over Little Pee Dee River | 1937 | 550 | Poor |
| S-609 over Crooked Creek | 1978 | 150 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Sc 9 Bus over Crooked Creek | 1921 | 10,100 | Poor |
| Sc 9 over Phillis Creek | 1932 | 8,300 | Poor |
| Sc 9 over Crooked Creek | 2010 | 7,900 | Good |
| US 15 over Beaver Dam Creek | 1939 | 7,600 | Fair |
| US 15 over Panther Creek | 1925 | 7,600 | Poor |
| Sc 38 over Three Creeks | 1994 | 7,500 | Fair |
| US 1 SB over Pee Dee Overflow (no. 1) | 1937 | 7,400 | Fair |
| US 1 SB over Pee Dee Overflow (no. 2) | 1937 | 7,400 | Fair |
| US 1 SB over Great Pee Dee River | 1938 | 7,400 | Fair |
| US 1 NB over Pee Dee Overflow (no. 1) | 1961 | 7,400 | 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.