T-420 Keller Rd over Campbell Run
Franklin County, Pennsylvania · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- T-420 Keller Rd over Campbell Run in Franklin County, Pennsylvania, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1997, making it 28 years old at the 2025 inventory.
- It carries about 200 vehicles a day (traffic count year 2009).
- Its listed owner is the county highway agency.
- It is one of 188 of the 292 inventoried bridges in Franklin County rated fair (64.4%); 26 (8.9%) 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 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (39.89796, -77.79323)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 35 ft |
| Location | 175 Ft West of SR 3013 |
| NBI structure number | 000000000017712 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 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 Franklin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-81 SR 0081 over Mountain Run | 2003 | 49,536 | Good |
| I-81;sr0081;t-490 over Br. of Conococheague CR. | 1963 | 45,479 | Fair |
| I-81 NB; SR 0081 over US 30; SR 0030 | 1963 | 24,134 | Fair |
| 81 NB over Conococheague | 2010 | 23,798 | Fair |
| 81 SB Road over Conococheague | 2010 | 23,776 | Fair |
| I-81 SB; SR 0081 over Pa 16; SR 0016 | 1963 | 23,493 | Fair |
All bridges nearby: Franklin County, PA bridge conditions · every bridge in Franklin County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.