Structure 3499 · Beaver County, PA
Carries Constitution Bl over Trib N Fork Little Bvr C, 150s.e.y&s R.r.at Crsig..
23 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 slab bridge.
| State | Pennsylvania |
| County | Beaver |
| Location | 150s.e.y&s R.r.at Crsig. |
| Carries | Constitution Bl |
| Crosses | Trib N Fork Little Bvr C |
| Coordinates | 40.80381, -80.44366 |
| Material | Concrete |
| Design | Slab |
| Total Length | 23.0 ft (7 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 89.9 ft (27.4 m) |
| Deck Area | 191.8 sq m |
| Main Spans | 1 |
| Year Built | 1952 (reconstructed 1978) |
| Avg Daily Traffic | 11,955 (2024) |
| Truck Traffic | 9% |
| Lanes On Bridge | 4 |
| Last Inspection | August 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 7 — Countermeasures installed |
| Structure Number | 000000000003499 |
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.