T-421 (cty. Br. 2) over White Deer Hole Creek
Union County, Pennsylvania · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- T-421 (cty. Br. 2) over White Deer Hole Creek in Union 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 1889 and reconstructed in 1994, making it 136 years old at the 2025 inventory.
- It carries about 13 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 7 of the 164 inventoried bridges in Union County rated poor (4.3%); 7 (4.3%) 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 → (41.10391, -76.898)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 4 | Poor condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Steel through truss |
| Length | about 89 ft |
| Location | 0.25 Mi.s of Allenwood |
| NBI structure number | 000000000033587 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Union County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR0015 over Buffalo Creek | 1930 | 21,561 | Fair |
| US 15 NB and SB over Trib Susquehanna River | 2002 | 17,555 | Good |
| US Tr 15 over over Winfield Creek | 1930 | 17,492 | Fair |
| SR 15 Nbl & Sbl over over White Deer Creek | 1963 | 17,258 | Good |
| SR 0015 (tr 15) over over S.R. 1010 | 1963 | 17,101 | Fair |
| I-80 WB over over US 15 NB & SB | 1962 | 16,130 | Good |
All bridges nearby: Union County, PA bridge conditions · every bridge in Union County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.