US 78 over College Park Canal
Charleston County, South Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 78 over College Park Canal in Charleston 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 2001, making it 24 years old at the 2025 inventory.
- It carries about 49,300 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 189 of the 339 inventoried bridges in Charleston County rated fair (55.8%); 9 (2.7%) 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 April 2023, 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 → (32.97299, -80.0532)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 31 ft |
| Location | Hanahan |
| NBI structure number | 000000000010845 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Charleston County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-26 over RR NS Spur & Taylor St | 1964 | 170,100 | Fair |
| I-26 over Goose Creek | 1960 | 109,600 | Fair |
| I-26 over RR Csxt | 1963 | 94,100 | Poor |
| US 17 over RR Csxt & US 52 Bus | 2005 | 94,100 | Fair |
| US 17 over Marsh | 2005 | 94,100 | Good |
| US 17 over Cooper River Town Creek | 2005 | 94,100 | Good |
All bridges nearby: Charleston County, SC bridge conditions · every bridge in Charleston County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.