US 191 over Drainage
Wheatland County, Montana · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 191 over Drainage in Wheatland County, Montana, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1942, making it 83 years old at the 2025 inventory.
- It carries about 706 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 14 of the 27 inventoried bridges in Wheatland County rated fair (51.9%); 4 (14.8%) 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 → (46.26731, -109.88815)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 38 ft |
| Location | 12M S Harlowton |
| NBI structure number | P00045031+06261 |
| 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) | 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 Wheatland County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 191 over RR | 2009 | 2,316 | Good |
| Third St NE over Abandoned Rr-antelope CR | 1939 | 2,063 | Poor |
| US 191 over Musselshell River | 1969 | 805 | Good |
| US 191 over Abandoned RR | 1969 | 805 | Good |
| US 191 over S Fork American Fork | 1941 | 706 | Poor |
| US 191 over American Fork | 1942 | 706 | Fair |
All bridges nearby: Wheatland County, MT bridge conditions · every bridge in Wheatland County · Montana bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.