I-20 over Jacks Branch
Darlington County, South Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-20 over Jacks Branch in Darlington County, South Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1974, making it 51 years old at the 2025 inventory.
- It carries about 30,400 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 107 of the 173 inventoried bridges in Darlington County rated fair (61.8%); 11 (6.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated January 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 → (34.20537, -79.97918)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 20 ft |
| Location | 5 Mi NE Lamar |
| NBI structure number | 000000000006460 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Darlington County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-95 NB over Black Creek | 2004 | 27,150 | Good |
| I-95 SB over Black Creek | 2004 | 27,150 | Good |
| US 52 over Indian Creek | 1972 | 24,000 | Fair |
| US 52 over High Hill Creek | 1924 | 19,800 | Fair |
| US 52 over High Hill Creek | 1924 | 19,800 | Fair |
| US 15 Bus over Prestwood Lake | 1945 | 17,100 | Fair |
All bridges nearby: Darlington County, SC bridge conditions · every bridge in Darlington County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.