Mcknight RD over Nelson Run Road
FairAllegheny County, Pennsylvania · Pittsburgh Nelson Run Rd. · Structure no. 000000000001902
- Built
- 1946
- 79 years old, rebuilt 1999
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 112 ft
- 1 main span
- Daily traffic
- 50,212
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mcknight RD over Nelson Run Road is a steel stringer/multi-beam or girder carrying Mcknight RD over Nelson Run Road in Allegheny County, Pennsylvania. It was built in 1946 and reconstructed in 1999, so it is 79 years old, older than the Pennsylvania average of 54.8 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 50,212 vehicles a day, roughly 2% of them trucks, projected to reach 35,553 by 2032. The structure is 112 ft (34.1 m) long and 70 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mcknight RD over Nelson Run Road built?
It was built in 1946, making it 79 years old in 2025. It was reconstructed in 1999.
What condition is Mcknight RD over Nelson Run Road 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 April 2023.
How much traffic does Mcknight RD over Nelson Run Road carry?
About 50,212 vehicles per day (2024 count), of which roughly 2% are trucks.
How long is Mcknight RD over Nelson Run Road?
The structure is 112 ft (34.1 m) long with a longest span of 99 ft (30.2 m) and a deck 70 ft wide.
Who owns Mcknight RD over Nelson Run Road?
It is owned by the State Highway Agency.