SR 642 over over Mahoning CR.
Montour County, Pennsylvania · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 642 over over Mahoning CR. in Montour County, Pennsylvania, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1995, making it 30 years old at the 2025 inventory.
- It carries about 2,057 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 54 of the 108 inventoried bridges in Montour County rated good (50.0%); 6 (5.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2023, on a 48-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (40.9854, -76.62556)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 79 ft |
| Location | 3 Mi N of Danville Boro |
| NBI structure number | 000000000028373 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Montour County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 Ebl over over S.R. 3013 | 1962 | 14,014 | Fair |
| I-80 Ebl over over Chillisquaque Creek | 1962 | 14,014 | Good |
| I-80 EB over over SR 3003 | 1963 | 14,014 | Fair |
| I-80 EB over over Branch Beaver Run | 1962 | 14,014 | Good |
| I-80 EB over Trib Mauses CR & SR 3007 | 1963 | 14,014 | Fair |
| I-80 WB over over S.R. 3013 | 1962 | 13,626 | Good |
All bridges nearby: Montour County, PA bridge conditions · every bridge in Montour County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.