US 12 over Four Mile Creek
Meagher County, Montana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 12 over Four Mile Creek in Meagher County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1937 and reconstructed in 1965, making it 88 years old at the 2025 inventory.
- It carries about 486 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 36 of the 53 inventoried bridges in Meagher County rated fair (67.9%); 7 (13.2%) 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 August 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 → (46.58549, -110.79215)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 25 ft |
| Location | 6M NE White Sulphur Spr |
| NBI structure number | P00014048+09521 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 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 Meagher County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 12 over South Fork Smith River | 1997 | 1,023 | Fair |
| US 89 Fh 32 over North Fork Smith River | 1955 | 607 | Fair |
| Main St over North Fork Smith River | 1962 | 575 | Fair |
| US 12 over N Fork Musselshell R | 2014 | 508 | Fair |
| US 89 Fh 32 over Sheep Creek | 1939 | 376 | Fair |
| US 12 over Flagstaff Creek | 2012 | 347 | Fair |
All bridges nearby: Meagher County, MT bridge conditions · every bridge in Meagher County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.