Structure 708 · Allegheny County, PA
Carries Clairton Bl over Fallen Timber Run, @ Int.w/roberts Hollow RD.
A culvert 21 ft across. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.
| State | Pennsylvania |
| County | Allegheny |
| Location | @ Int.w/roberts Hollow RD |
| Carries | Clairton Bl |
| Crosses | Fallen Timber Run |
| Coordinates | 40.24954, -79.87746 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Area | 132.5 sq m |
| Main Spans | 1 |
| Year Built | 1948 |
| Avg Daily Traffic | 20,208 (2024) |
| Truck Traffic | 6% |
| Lanes On Bridge | 4 |
| Last Inspection | December 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 4 — Foundations need monitoring |
| Structure Number | 000000000000708 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.