I85 SBL&US15 over SR1632
Durham County, North Carolina · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I85 SBL&US15 over SR1632 in Durham County, North Carolina, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1965 and reconstructed in 1997, making it 60 years old at the 2025 inventory.
- It carries about 42,500 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 190 of the 313 inventoried bridges in Durham County rated fair (60.7%); 10 (3.2%) 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 March 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 → (36.04587, -78.81546)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 126 ft |
| Location | .33 MI.S.JCT.SR1637 |
| NBI structure number | 000000000630201 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| 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 Durham County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I40 over SR1973 | 1995 | 147,000 | Fair |
| I40 Wbl over NC55 | 1985 | 107,000 | Fair |
| I85 & US15 over Ellerbee Creek | 1960 | 104,000 | Fair |
| I40 over Northeast Creek | 1985 | 101,000 | Fair |
| I85N over NC55 | 2005 | 80,000 | Good |
| I85 US15 US70 over SR1671 | 2001 | 80,000 | Good |
All bridges nearby: Durham County, NC bridge conditions · every bridge in Durham County · North Carolina bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.