Alexander ST over Saw Mill Run
PoorPosted for loadAllegheny County, Pennsylvania · 001 Alexander ST Bridge · Structure no. 000000000002392
- Built
- 1924
- 101 years old, rebuilt 2010
- Condition
- Poor
- inspected June 2024
- Type
- Girder and Floorbeam System
- Steel
- Length
- 42 ft
- 1 main span
- Daily traffic
- 20
- 2024 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Alexander ST over Saw Mill Run is a steel girder and floorbeam system carrying Alexander ST over Saw Mill Run in Allegheny County, Pennsylvania. It was built in 1924 and reconstructed in 2010, 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. Its operating status is: posted for load restriction.
It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 110 by 2044. The structure is 42 ft (12.8 m) long and 12 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 7 Good | Some minor problems. |
| 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 Alexander ST over Saw Mill Run built?
It was built in 1924, making it 101 years old in 2025. It was reconstructed in 2010.
What condition is Alexander ST over Saw Mill 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 June 2024.
How much traffic does Alexander ST over Saw Mill Run carry?
About 20 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is Alexander ST over Saw Mill Run?
The structure is 42 ft (12.8 m) long with a longest span of 40 ft (12.2 m) and a deck 12 ft wide.
Who owns Alexander ST over Saw Mill Run?
It is owned by the City or Municipal Highway Agency.