SR1800 over US401SB
Wake County, North Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR1800 over US401SB in Wake County, North Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1960, making it 65 years old at the 2025 inventory.
- It carries about 2,100 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 300 of the 800 inventoried bridges in Wake County rated fair (37.5%); 42 (5.2%) 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 August 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 → (35.79833, -78.63927)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 177 ft |
| Location | 0.11 Mi N Jct US401N |
| NBI structure number | 000000001830200 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the North Carolina department of transportation.
Busiest bridges in Wake County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I40 Wbl over Crabtree Creek | 1969 | 133,000 | Fair |
| I40 Wbl over SR1728 | 1981 | 133,000 | Good |
| I440 over SR1676(LAKE Boone Trail) | 1960 | 120,000 | Fair |
| I440 over US70 | 1960 | 120,000 | Fair |
| I-40 over Stirrup Iron Creek | 1969 | 120,000 | Fair |
| I40 over Big Branch Creek | 1986 | 119,000 | Fair |
All bridges nearby: Wake County, NC bridge conditions · every bridge in Wake County · North Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.