Bridge conditions in Broadwater County, Montana
37 inventoried bridges · 4 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 9 bridges in Broadwater County is rated in poor condition: 4 of 37 on the federal inventory, one of the higher shares in Montana.
- 4 of the 37 bridges in Broadwater County, Montana, are rated in poor condition (10.8%) in the 2025 National Bridge Inventory, as of .
- 10 bridges (27.0%) are rated good and 23 (62.2%) fair.
- The median Broadwater County bridge was built in 1983.
- The busiest poor-rated bridge is S 285 over Toston Canal (built 1948), carrying about 422 vehicles a day.
Good 27.0% · Fair 62.2% · Poor 10.8% of 37 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| S 285 over Toston Canal | 1948 | 422 | Poor |
| Hwy 287 Bypass over Missouri River 019 | 1920 | 178 | Poor |
| Flynn Ln over Broadwater Missouri 006 | 1976 | 100 | Poor |
| Lower Ray Cr Road over CF WMA - Eastside Canal | 1974 | 5 | Poor |
Busiest bridges in the 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 |
| US 287 over RR | 2020 | 5,250 | Good |
| US 287 over Missouri River | 2020 | 5,250 | Good |
| US 287 over Milligan Creek | 1968 | 1,553 | Fair |
| US 12 over Deep Creek | 2007 | 1,323 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Montana: Montana bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.