Mary ST over Plum Creek
FairPosted for loadAllegheny County, Pennsylvania · 466102 Mary St-Plum Boro · Structure no. 000000000002690
- Built
- 1930
- 95 years old, rebuilt 2004
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 36 ft
- 1 main span
- Daily traffic
- 150
- 2017 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Mary ST over Plum Creek is a steel stringer/multi-beam or girder carrying Mary ST over Plum Creek in Allegheny County, Pennsylvania. It was built in 1930 and reconstructed in 2004, so it is 95 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. Its operating status is: posted for load restriction.
It carries about 150 vehicles a day, roughly 5% of them trucks, projected to reach 175 by 2039. The structure is 36 ft (11 m) long and 21 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Mary ST over Plum Creek built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2004.
What condition is Mary ST over Plum Creek 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 July 2024.
How much traffic does Mary ST over Plum Creek carry?
About 150 vehicles per day (2017 count), of which roughly 5% are trucks.
How long is Mary ST over Plum Creek?
The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 21 ft wide.
Who owns Mary ST over Plum Creek?
It is owned by the City or Municipal Highway Agency.