Structure 12721 · Columbia County, PA
Carries Black Run Road over Over Black Run, 1 Mi S Of Eyers Grove.
Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.
How ratings work24 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a tee-beam bridge.
| State | Pennsylvania |
| County | Columbia |
| Location | 1 Mi S Of Eyers Grove |
| Carries | Black Run Road |
| Crosses | Over Black Run |
| Coordinates | 41.07465, -76.51110 |
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 26.2 ft (8 m) |
| Deck Area | 58.4 sq m |
| Main Spans | 1 |
| Year Built | 1936 |
| Avg Daily Traffic | 115 (2024) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
| Last Inspection | February 2024 |
| 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 | 000000000012721 |
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.