Bridge conditions in Roosevelt County, Montana
57 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Roosevelt County has 7 bridges rated poor out of 57 inventoried, a 12.3% share that puts it well above the national rate of about 7%.
- 7 of the 57 bridges in Roosevelt County, Montana, are rated in poor condition (12.3%) in the 2025 National Bridge Inventory, as of .
- 14 bridges (24.6%) are rated good and 36 (63.2%) fair.
- The median Roosevelt County bridge was built in 1988.
- The busiest poor-rated bridge is Irr - US 2 over Chelsea Creek (built 1960), carrying about 2,054 vehicles a day.
Good 24.6% · Fair 63.2% · Poor 12.3% of 57 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 |
|---|---|---|---|
| Irr - US 2 over Chelsea Creek | 1960 | 2,054 | Poor |
| Irr - US 2 over Drainage | 1970 | 1,452 | Poor |
| Poplar River Rd over Poplar River 015 | 1985 | 563 | Poor |
| Irr - S 13 over Sprague Coulee | 1931 | 229 | Poor |
| Irr - S 13 over W Fork Poplar R Ovrflow | 1932 | 229 | Poor |
| Irr - S 251 over Hay Creek | 1950 | 88 | Poor |
| County Road 641 over Sheep Creek 002 | 1986 | 9 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irr - US 2 over Mosquito Creek | 1986 | 4,269 | Fair |
| Irr - US 2 over Little Wolf Creek | 1988 | 4,269 | Fair |
| Irr - US 2 over Poplar River | 2000 | 2,296 | Fair |
| S 16 over Sheep Creek | 1970 | 2,129 | Fair |
| Irr - US 2 over Tule Creek | 1958 | 2,054 | Fair |
| Irr - US 2 over Chelsea Creek | 1960 | 2,054 | Poor |
| Irr - US 2 over Wolf Creek | 1956 | 1,982 | Fair |
| US 2 over Shotgun Creek | 2010 | 1,765 | Fair |
| US-2 over Clover Creek | 2020 | 1,651 | Fair |
| US 2 over Red Bank Creek | 2010 | 1,516 | 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.