I85 US15 N over SR1637
FairDurham County, North Carolina · 1.43 Mi.N.Jct SR1632 · Structure no. 000000000630222
- Built
- 1957
- 68 years old, rebuilt 1996
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 177 ft
- 3 main spans
- Daily traffic
- 21,250
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
I85 US15 N over SR1637 is a prestressed concrete stringer/multi-beam or girder carrying I85 US15 N over SR1637 in Durham County, North Carolina. It was built in 1957 and reconstructed in 1996, so it is 68 years old, older than the North Carolina average of 38.7 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 21,250 vehicles a day, roughly 23% of them trucks, projected to reach 42,500 by 2040. The structure is 177 ft (53.9 m) long and 52 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I85 US15 N over SR1637 built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1996.
What condition is I85 US15 N over SR1637 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.
How much traffic does I85 US15 N over SR1637 carry?
About 21,250 vehicles per day (2020 count), of which roughly 23% are trucks.
How long is I85 US15 N over SR1637?
The structure is 177 ft (53.9 m) long with a longest span of 58 ft (17.6 m) and a deck 52 ft wide.
Who owns I85 US15 N over SR1637?
It is owned by the State Highway Agency.