T-401 Nipple Road over Mahantango Creek
Juniata County, Pennsylvania · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- T-401 Nipple Road over Mahantango Creek in Juniata County, Pennsylvania, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1989, making it 36 years old at the 2025 inventory.
- It carries about 200 vehicles a day (traffic count year 2011).
- Its listed owner is a town or township highway agency.
- It is one of 22 of the 169 inventoried bridges in Juniata County rated poor (13.0%); 22 (13.0%) 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 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 → (40.64247, -77.00609)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 64 ft |
| Location | 0.1 Mi East of SR 2023 |
| NBI structure number | 000000000020345 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Juniata County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 22-us 22 over Horning Run | 1972 | 19,284 | Good |
| SR-22 over Macedonia Run | 2006 | 11,376 | Good |
| SR 22-us 22 over Macedonia Run | 2006 | 10,844 | Good |
| SR 22-us 22 over Township Road 466 | 1972 | 10,451 | Fair |
| SR 22-us 22 over Township Road 554 | 1972 | 10,451 | Fair |
| SR 22-us 22 over Township Road | 1973 | 9,973 | Fair |
All bridges nearby: Juniata County, PA bridge conditions · every bridge in Juniata County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.