Cliff Mine RD over Mc Clarens Run
GoodAllegheny County, Pennsylvania · MC01 Mcclarens Run # 1 · Structure no. 000000000002334
- Built
- 1949
- 76 years old, rebuilt 1982
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 51 ft
- 1 main span
- Daily traffic
- 23,000
- 2013 count
- Owner
- County
- County Highway Agency
About this bridge
Cliff Mine RD over Mc Clarens Run is a steel stringer/multi-beam or girder carrying Cliff Mine RD over Mc Clarens Run in Allegheny County, Pennsylvania. It was built in 1949 and reconstructed in 1982, so it is 76 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 23,000 vehicles a day, roughly 5% of them trucks, projected to reach 10,000 by 2026. The structure is 51 ft (15.5 m) long and 54 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Cliff Mine RD over Mc Clarens Run built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1982.
What condition is Cliff Mine RD over Mc Clarens Run 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 May 2023.
How much traffic does Cliff Mine RD over Mc Clarens Run carry?
About 23,000 vehicles per day (2013 count), of which roughly 5% are trucks.
How long is Cliff Mine RD over Mc Clarens Run?
The structure is 51 ft (15.5 m) long with a longest span of 47 ft (14.3 m) and a deck 54 ft wide.
Who owns Cliff Mine RD over Mc Clarens Run?
It is owned by the County Highway Agency.