T-428 Grubb RD over S Br Slippery Rock CR
FairButler County, Pennsylvania · Btw T540 & SR4010 · Structure no. 000000000008177
- Built
- 1912
- 113 years old, rebuilt 1994
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 43 ft
- 1 main span
- Daily traffic
- 100
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
T-428 Grubb RD over S Br Slippery Rock CR is a steel stringer/multi-beam or girder carrying T-428 Grubb RD over S Br Slippery Rock CR in Butler County, Pennsylvania. It was built in 1912 and reconstructed in 1994, so it is 113 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 100 vehicles a day, roughly 9% of them trucks, projected to reach 140 by 2037. The structure is 43 ft (13.1 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 T-428 Grubb RD over S Br Slippery Rock CR built?
It was built in 1912, making it 113 years old in 2025. It was reconstructed in 1994.
What condition is T-428 Grubb RD over S Br Slippery Rock CR 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 2023.
How much traffic does T-428 Grubb RD over S Br Slippery Rock CR carry?
About 100 vehicles per day (2017 count), of which roughly 9% are trucks.
How long is T-428 Grubb RD over S Br Slippery Rock CR?
The structure is 43 ft (13.1 m) long with a longest span of 41 ft (12.5 m) and a deck 18 ft wide.
Who owns T-428 Grubb RD over S Br Slippery Rock CR?
It is owned by the County Highway Agency.