SR 846 Orngvlle.rd over over Big Run Trib
Mercer County, Pennsylvania · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 846 Orngvlle.rd over over Big Run Trib in Mercer County, Pennsylvania, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1910 and reconstructed in 1984, making it 115 years old at the 2025 inventory.
- It carries about 741 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (41.38701, -80.43813)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 24 ft |
| Location | West Salem Township |
| NBI structure number | 000000000025900 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
All bridges nearby: Mercer County, PA bridge conditions · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.