US 321 over South Edisto River Swamp
Bamberg County, South Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 321 over South Edisto River Swamp in Bamberg County, South Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1953, making it 72 years old at the 2025 inventory.
- It carries about 3,000 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 65 of the 82 inventoried bridges in Bamberg County rated fair (79.3%); 7 (8.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 7 to 6, substructure 7 to 6.
- Its most recent inspection on record is dated April 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (33.38771, -81.1341)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 215 ft |
| Location | 6MI N of Denmark |
| NBI structure number | 000000000001918 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Bamberg County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 601 over Lemon Creek | 1954 | 3,200 | Fair |
| Sc 70 over Hayes Mill Creek | 1996 | 3,200 | Fair |
| US 301 SB over South Edisto River Swamp | 1933 | 3,150 | Fair |
| US 301 NB over South Edisto River Swamp | 1971 | 3,150 | Fair |
| US 301 NB over S. Edisto River | 1971 | 3,150 | Fair |
| US 301 SB over S Edisto River | 2023 | 3,150 | Good |
All bridges nearby: Bamberg County, SC bridge conditions · every bridge in Bamberg County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.