Hyalite Road over Hyalite Creek
Gallatin County, Montana · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Hyalite Road over Hyalite Creek in Gallatin County, Montana, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 1988, making it 37 years old at the 2025 inventory.
- It carries about 99 vehicles a day.
- It is one of 43 of the 212 inventoried bridges in Gallatin County rated good (20.3%); 12 (5.7%) 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 2021, on a 48-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (45.49798, -110.98368)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 82 ft |
| Location | Hyalite Canyon |
| NBI structure number | 011106000000030 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2021 |
| Inspection interval (item 91) | 48 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 Montana department of transportation.
Busiest bridges in Gallatin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| N Seventh Ave over Int N 7TH Ave-i 90 | 2014 | 26,020 | Fair |
| US 191-huffine Ln over Hyalite Creek | 1956 | 25,670 | Fair |
| N 19TH Ave over Int N 19TH Ave | 1994 | 23,992 | Fair |
| I 90 over Walking Path | 2011 | 21,232 | Fair |
| I 90 over Int Airway Blvd | 2014 | 15,554 | Fair |
| I 90 over Int Airway Blvd | 2014 | 15,554 | Fair |
All bridges nearby: Gallatin County, MT bridge conditions · every bridge in Gallatin County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.