Mifflin RD over SR 8059
GoodAllegheny County, Pennsylvania · At Glenwood Interchange · Structure no. 000000000001307
- Built
- 1967
- 58 years old, rebuilt 2017
- Condition
- Good
- inspected June 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 59 ft
- 1 main span
- Daily traffic
- 8,513
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mifflin RD over SR 8059 is a prestressed concrete box beam or girders - multiple carrying Mifflin RD over SR 8059 in Allegheny County, Pennsylvania. It was built in 1967 and reconstructed in 2017, so it is 58 years old, older than the Pennsylvania average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 8,513 vehicles a day, roughly 8% of them trucks, projected to reach 6,740 by 2032. The structure is 59 ft (18 m) long and 46 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mifflin RD over SR 8059 built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2017.
What condition is Mifflin RD over SR 8059 in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.
How much traffic does Mifflin RD over SR 8059 carry?
About 8,513 vehicles per day (2024 count), of which roughly 8% are trucks.
How long is Mifflin RD over SR 8059?
The structure is 59 ft (18 m) long with a longest span of 54 ft (16.5 m) and a deck 46 ft wide.
Who owns Mifflin RD over SR 8059?
It is owned by the State Highway Agency.