Bridge conditions in Flathead County, Montana
204 inventoried bridges · 9 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Flathead County tracks close to typical: 9 of its 204 inventoried bridges (4.4%) are rated poor, against a national rate of about 7%.
- 9 of the 204 bridges in Flathead County, Montana, are rated in poor condition (4.4%) in the 2025 National Bridge Inventory, as of .
- 69 bridges (33.8%) are rated good and 126 (61.8%) fair.
- The median Flathead County bridge was built in 1983.
- The busiest poor-rated bridge is S 82 over Flathead River (built 1955), carrying about 8,310 vehicles a day.
Good 33.8% · Fair 61.8% · Poor 4.4% of 204 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 82 over Flathead River | 1955 | 8,310 | Poor |
| Irr - US 2 over RR | 1956 | 2,225 | Poor |
| Bridge St over Swan River 110 | 1911 | 1,503 | Poor |
| Irr-us 2 over Unstable Slope | 1981 | 1,013 | Poor |
| Holt Stage Rd over Flathead Riv OVERFL0 014 | 1992 | 100 | Poor |
| W Reserve Dr over Whitefish River | 1983 | 100 | Poor |
| Forest Road over Good Creek | 1962 | 20 | Poor |
| Forest Road over Graves Creek | 1970 | 10 | Poor |
| Whale Creek Road over Whale Creek | 1954 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 93 over Stillwater River | 1996 | 25,919 | Fair |
| N00109 over US 2 | 2016 | 22,752 | Good |
| Irr - US 2 over Flathead River | 1977 | 22,220 | Fair |
| US 93 Alternate over Foys Lake Road | 2021 | 19,966 | Good |
| US 93 Bypass over Ashley Creek | 2010 | 19,966 | Good |
| P00109 over Old Reserve Drive | 2016 | 19,964 | Good |
| US 93 over Ashley Creek | 2001 | 18,053 | Fair |
| Spokane Ave over Whitefish River | 1959 | 16,086 | Good |
| Baker Ave over RR | 1994 | 15,102 | Fair |
| S 40 over Whitefish River | 1975 | 13,795 | Good |
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.