SR1415 over Porter Swamp
Columbus County, North Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR1415 over Porter Swamp in Columbus County, North Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1996, making it 29 years old at the 2025 inventory.
- It carries about 450 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 80 of the 230 inventoried bridges in Columbus County rated fair (34.8%); 3 (1.3%) 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 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 → (34.31128, -78.90338)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete slab |
| Length | about 91 ft |
| Location | 0.4 Mi. N. of Jct. SR1413 |
| NBI structure number | 000000000470285 |
| 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) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Carolina department of transportation.
Busiest bridges in Columbus County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US74W NC130 over Lumber River Overflow | 2000 | 23,500 | Good |
| US74E over Lumber River | 1998 | 23,500 | Good |
| US74 over Rough Horn Branch | 1958 | 22,000 | Fair |
| US74 over Cow Branch | 1969 | 21,500 | Fair |
| US74 US76E over White Marsh Swamp | 1974 | 16,500 | Fair |
| US74 US76W over White Marsh Swamp | 1974 | 16,500 | Fair |
All bridges nearby: Columbus County, NC bridge conditions · every bridge in Columbus County · North Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.