T-427 Windy Road over Slippery Rock Creek
Fair Condition100 years old100 vehicles/day
Location
| State | Pennsylvania |
| County | Butler |
| Location | 0.6 Mi NW Of Branchton RD |
| Carries | T-427 Windy Road |
| Crosses | Slippery Rock Creek |
| Coordinates | 41.08464, -79.94710 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 5 (Fair) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 58.1 ft (17.7 m) |
| Max Span | 55.1 ft (16.8 m) |
| Deck Width | 18.0 ft (5.5 m) |
| Deck Area | 97.3 sq m |
| Main Spans | 1 |
| Year Built | 1926 (reconstructed 1993) |
Traffic
| Avg Daily Traffic | 100 (2015) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000000008178 |