Structure 33917 · Venango County, PA
Carries T-357 Porterfield over Over Mill Creek, Richland Township.
Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.
How ratings work20 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 deck arch.
| State | Pennsylvania |
| County | Venango |
| Location | Richland Township |
| Carries | T-357 Porterfield |
| Crosses | Over Mill Creek |
| Coordinates | 41.24589, -79.68718 |
| Material | Masonry |
| Design | Arch - Deck |
| Total Length | 20.0 ft (6.1 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 17.1 ft (5.2 m) |
| Deck Area | 31.7 sq m |
| Main Spans | 1 |
| Year Built | 1901 |
| Avg Daily Traffic | 100 (2014) |
| Truck Traffic | 10% |
| Lanes On Bridge | 1 |
| Last Inspection | February 2024 |
| Inspection Frequency | Every 24 months |
| Owner | Town/Township Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 4 — Foundations need monitoring |
| Structure Number | 000000000033917 |
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.