Pearce Mill RD over Irwin Run
FairAllegheny County, Pennsylvania · IW01 Irwin Run No. 1 · Structure no. 000000000002162
- Built
- 1936
- 89 years old
- Condition
- Fair
- inspected June 2023
- Type
- Arch - Deck
- Concrete
- Length
- 23 ft
- 1 main span
- Daily traffic
- 3,569
- 2005 count
- Owner
- County
- County Highway Agency
About this bridge
Pearce Mill RD over Irwin Run is a concrete arch - deck carrying Pearce Mill RD over Irwin Run in Allegheny County, Pennsylvania. It was built in 1936, so it is 89 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 3,569 vehicles a day, roughly 3% of them trucks, projected to reach 3,569 by 2023. The structure is 23 ft (7 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 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 |
|---|---|---|
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Pearce Mill RD over Irwin Run built?
It was built in 1936, making it 89 years old in 2025.
What condition is Pearce Mill RD over Irwin Run 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 June 2023.
How much traffic does Pearce Mill RD over Irwin Run carry?
About 3,569 vehicles per day (2005 count), of which roughly 3% are trucks.
How long is Pearce Mill RD over Irwin Run?
The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 50 ft wide.
Who owns Pearce Mill RD over Irwin Run?
It is owned by the County Highway Agency.