Irr Bia Rte 25 over Badger Creek
Glacier County, Montana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 25 over Badger Creek in Glacier County, Montana, 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 1979, making it 46 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2023).
- It is one of 40 of the 71 inventoried bridges in Glacier County rated fair (56.3%); 3 (4.2%) 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 September 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 → (48.36742, -112.80544)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 135 ft |
| Location | 10 Km North Heart Butte |
| NBI structure number | 00000000000C131 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Montana department of transportation.
Busiest bridges in Glacier County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irr - US 2 over RR | 1997 | 3,716 | Good |
| Irr - US 2 over Cut Bank Creek | 2007 | 3,523 | Fair |
| Irr - US 2 over RR | 1997 | 2,515 | Good |
| Irr - US 89 over St Marys River | 1956 | 2,355 | Fair |
| Going-to-the-sun R over St. Mary River | 1934 | 2,300 | Fair |
| Going-to-the-sun R over Divide Creek | 1934 | 2,300 | Fair |
All bridges nearby: Glacier County, MT bridge conditions · every bridge in Glacier County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.