SR1159 over Flat Swamp
Martin County, North Carolina · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR1159 over Flat Swamp in Martin County, North Carolina, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2020, making it 5 years old at the 2025 inventory.
- It carries about 950 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 58 of the 124 inventoried bridges in Martin County rated good (46.8%); 4 (3.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 9 to 8, superstructure 9 to 8, substructure 9 to 8.
- Its most recent inspection on record is dated August 2024, on a 24-month routine inspection cycle.
- 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 → (35.81591, -77.26414)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 9 | 8 | Very good condition |
| Superstructure | 9 | 8 | Very good condition |
| Substructure | 9 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete slab |
| Length | about 71 ft |
| Location | 0.2 Mi.n. Jcts. SR1158 |
| NBI structure number | 000000001170071 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 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 Martin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US13 US64 over Back Swamp Branch | 1999 | 10,000 | Fair |
| US13 US64E over Fork of Collie Creek | 1999 | 9,800 | Good |
| US13 US64E over US64ALT | 1999 | 9,000 | Good |
| US13 US64 over Flat Swamp | 1999 | 9,000 | Good |
| US13/64E over NC903 | 1999 | 8,200 | Fair |
| US13 US64E over Ross Swamp | 1999 | 8,200 | Fair |
All bridges nearby: Martin County, NC bridge conditions · every bridge in Martin County · North Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.