T-470 Gardeau Road over Half Mile Run
McKean County, Pennsylvania · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- T-470 Gardeau Road over Half Mile Run in McKean County, Pennsylvania, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1950, making it 75 years old at the 2025 inventory.
- It carries about 40 vehicles a day (traffic count year 2014).
- Its listed owner is a town or township highway agency.
- It is one of 40 of the 226 inventoried bridges in McKean County rated poor (17.7%); 40 (17.7%) are rated poor.
- 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 → (41.6277, -78.22092)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 5 | Fair condition |
| Superstructure | 4 | Poor condition |
| Substructure | 4 | Poor condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 34 ft |
| Location | 2500 Ft North of Gardeau |
| NBI structure number | 000000000025600 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in McKean County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 219-us 219 over SR 346 and SR 4013 | 1977 | 11,194 | Fair |
| SR 219-us 219 over SR 4002 | 2003 | 9,406 | Good |
| SR 219-us 219 over Sheppard Run | 1992 | 8,523 | Good |
| SR 219-us 219 over Mill St - B&p Railroad | 2006 | 8,482 | Good |
| SR 346-pa 346 over Tunungwant Creek | 1997 | 8,402 | Fair |
| SR 346-pa 346 over West Branch Tunungwant C | 1905 | 7,876 | Fair |
All bridges nearby: McKean County, PA bridge conditions · every bridge in McKean County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.