Old William Penn over Thompson Run
PoorAllegheny County, Pennsylvania · Intersect Thompson Run · Structure no. 000000000046768
- Built
- 1924
- 101 years old
- Condition
- Poor
- inspected September 2023
- Type
- Tee Beam
- Concrete
- Length
- 33 ft
- 1 main span
- Daily traffic
- 16,904
- 2016 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
Old William Penn over Thompson Run is a concrete tee beam carrying Old William Penn over Thompson Run in Allegheny County, Pennsylvania. It was built in 1924, so it is 101 years old, older than the Pennsylvania average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 16,904 vehicles a day, roughly 5% of them trucks, projected to reach 19,000 by 2039. The structure is 33 ft (10.1 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old William Penn over Thompson Run built?
It was built in 1924, making it 101 years old in 2025.
What condition is Old William Penn over Thompson Run in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.
How much traffic does Old William Penn over Thompson Run carry?
About 16,904 vehicles per day (2016 count), of which roughly 5% are trucks.
How long is Old William Penn over Thompson Run?
The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.
Who owns Old William Penn over Thompson Run?
It is owned by the Town or Township Highway Agency.