Bridge conditions in Park County, Montana
126 inventoried bridges · 13 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 10 bridges in Park County is rated in poor condition: 13 of 126 on the federal inventory, one of the higher shares in Montana.
- 13 of the 126 bridges in Park County, Montana, are rated in poor condition (10.3%) in the 2025 National Bridge Inventory, as of .
- 27 bridges (21.4%) are rated good and 86 (68.3%) fair.
- The median Park County bridge was built in 1977.
- The busiest poor-rated bridge is US 89 over Int East Livingston I 90 (built 1962), carrying about 2,910 vehicles a day.
Good 21.4% · Fair 68.3% · Poor 10.3% of 126 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 |
|---|---|---|---|
| US 89 over Int East Livingston I 90 | 1962 | 2,910 | Poor |
| Main Boulder Road over Boulder River | 1950 | 157 | Poor |
| Nf-6639 Rd over Boulder River 041 | 1933 | 157 | Poor |
| Elk Creek Rd over Shields River 018 | 1960 | 100 | Poor |
| Shields River Rd E over Shields River Overfl 022 | 1938 | 100 | Poor |
| Shields River Rd E over Shields River 023 | 1923 | 100 | Poor |
| Hammond Creek Rd over Rock Creek 025 | 1967 | 100 | Poor |
| Potter Creek Rd over Potter Creek 005 | 1915 | 100 | Poor |
| Swandal Rd over Flathead Creek 073 | 1970 | 100 | Poor |
| Swingley Rd over W Boulder River 038 | 1938 | 52 | Poor |
| Big Creek Road over Big Creek | 1961 | 50 | Poor |
| Templed Hills Rd. over Mill Creek | 1952 | 50 | Poor |
| Station Road over Boulder River | 1947 | 1 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 90 over Int West Livingston | 1962 | 9,461 | Fair |
| I 90 over Int West Livingston | 1962 | 9,461 | Fair |
| I 90 over Int S Livingston-us Hwy | 1962 | 9,461 | Fair |
| I 90 over Quinn Creek Road | 2022 | 8,272 | Good |
| I 90 over Quinn Creek Road | 2022 | 8,272 | Good |
| I 90 over Int Hopper | 1978 | 8,236 | Fair |
| I 90 over Int Hopper | 1978 | 8,236 | Fair |
| I 90 over Orea Creek Road | 1977 | 8,236 | Fair |
| I 90 over Orea Creek Road | 1977 | 8,236 | Fair |
| I 90 over Int S Livingston-us Hwy | 1962 | 6,397 | 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.