Bridge conditions in Allendale County, South Carolina
69 inventoried bridges · 9 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Allendale County has 9 bridges rated poor out of 69 inventoried, a 13.0% share that puts it well above the national rate of about 7%.
- 9 of the 69 bridges in Allendale County, South Carolina, are rated in poor condition (13.0%) in the 2025 National Bridge Inventory, as of .
- 15 bridges (21.7%) are rated good and 45 (65.2%) fair.
- The median Allendale County bridge was built in 1965.
- The busiest poor-rated bridge is US 301 over Savannah River (built 1965), carrying about 1,300 vehicles a day.
Good 21.7% · Fair 65.2% · Poor 13.0% of 69 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 301 over Savannah River | 1965 | 1,300 | Poor |
| Sc 3 over Little Briar Creek | 1957 | 800 | Poor |
| Sc 3 over King Creek | 1957 | 700 | Poor |
| Sc 3 over Watchcaw Creek | 1957 | 700 | Poor |
| S-3-66 over Lower Three Run Creek | 1950 | 125 | Poor |
| S-3-88 over Bentley Branch | 1961 | 125 | Poor |
| S-3-241 over Miller Creek | 1961 | 125 | Poor |
| S-3-241 over Miller Creek | 1961 | 125 | Poor |
| S-3-342 over Call Branch | 1966 | 125 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 278 over Duck Creek | 1922 | 6,200 | Fair |
| US 278 over Southern Railroad | 1961 | 3,500 | Fair |
| US 301 over Salkehatchie River Swamp | 1959 | 3,000 | Fair |
| US 301 over Salkehatchie River Swamp | 1959 | 3,000 | Fair |
| US 301 over Salkehatchie River | 1937 | 3,000 | Fair |
| US 278 over Log Creek | 1945 | 2,900 | Fair |
| US 321 over Jackson Creek | 1921 | 2,100 | Fair |
| US 321 over Jackson Creek | 1979 | 2,100 | Fair |
| Sc 125 over Furse Mill Creek | 1929 | 1,950 | Fair |
| US 301 over Log Branch | 1955 | 1,800 | 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.