US 12 over Deep Creek
Broadwater County, Montana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 12 over Deep Creek in Broadwater 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 2007, making it 18 years old at the 2025 inventory.
- It carries about 1,323 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 23 of the 37 inventoried bridges in Broadwater County rated fair (62.2%); 4 (10.8%) 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 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 → (46.32472, -111.29344)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 74 ft |
| Location | 10M E Townsend |
| NBI structure number | P00014011+01551 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 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 Broadwater County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US287 over Beaver Creek | 1992 | 6,930 | Fair |
| US 12 over Missouri River | 1935 | 6,843 | Fair |
| US 287 over Mud Spring Gulch | 2013 | 6,444 | Good |
| US 287 over Int Three Forks I 90 | 2012 | 6,444 | Fair |
| US 287 over Deep Creek | 2012 | 5,485 | Fair |
| US 287 over Six Mile Creek | 2020 | 5,250 | Good |
All bridges nearby: Broadwater County, MT bridge conditions · every bridge in Broadwater County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.