T-601 Ralston RD over Slippery Rock Creek
FairButler County, Pennsylvania · 0.2 MI NW of SR 008 · Structure no. 000000000008284
- Built
- 1992
- 33 years old
- Condition
- Fair
- inspected July 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 157 ft
- 2 main spans
- Daily traffic
- 500
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
T-601 Ralston RD over Slippery Rock Creek is a prestressed concrete continuous box beam or girders - multiple carrying T-601 Ralston RD over Slippery Rock Creek in Butler County, Pennsylvania. It was built in 1992, so it is 33 years old, younger 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 500 vehicles a day, roughly 9% of them trucks, projected to reach 525 by 2035. The structure is 157 ft (47.9 m) long and 33 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 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was T-601 Ralston RD over Slippery Rock Creek built?
It was built in 1992, making it 33 years old in 2025.
What condition is T-601 Ralston RD over Slippery Rock 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 2023.
How much traffic does T-601 Ralston RD over Slippery Rock Creek carry?
About 500 vehicles per day (2015 count), of which roughly 9% are trucks.
How long is T-601 Ralston RD over Slippery Rock Creek?
The structure is 157 ft (47.9 m) long with a longest span of 78 ft (23.8 m) and a deck 33 ft wide.
Who owns T-601 Ralston RD over Slippery Rock Creek?
It is owned by the County Highway Agency.