US 378 over Little Pee Dee Swamp
Horry County, South Carolina · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 378 over Little Pee Dee Swamp in Horry County, South Carolina, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2012, making it 13 years old at the 2025 inventory.
- It carries about 9,100 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 225 of the 480 inventoried bridges in Horry County rated good (46.9%); 24 (5.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (33.83609, -79.23776)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 439 ft |
| Location | 10 Mi W of Conway |
| NBI structure number | 000000000001189 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the South Carolina department of transportation.
Busiest bridges in Horry County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 501 over Intercoastal Waterway | 1963 | 63,800 | Fair |
| US 501 Byp over U.S.701 | 1958 | 56,800 | Poor |
| US 501 Byp over Waccamaw River | 1958 | 56,800 | Poor |
| S-26-1315 over Grissom Parkway Tunnel | 2002 | 55,000 | Good |
| S-26-1315 over Sc 31 | 2002 | 55,000 | Good |
| S-26-1315 over L-6311 | 2002 | 55,000 | Good |
All bridges nearby: Horry County, SC bridge conditions · every bridge in Horry County · South Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.