Bridge conditions in Glacier County, Montana
71 inventoried bridges · 3 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
3 of the 71 bridges the federal inventory lists in Glacier County are rated poor; the rest split 28 good and 40 fair.
- 3 of the 71 bridges in Glacier County, Montana, are rated in poor condition (4.2%) in the 2025 National Bridge Inventory, as of .
- 28 bridges (39.4%) are rated good and 40 (56.3%) fair.
- The median Glacier County bridge was built in 1973.
- The busiest poor-rated bridge is Irr Bia Rte 2 over Dawson Creek (built 1932), carrying about 100 vehicles a day.
Good 39.4% · Fair 56.3% · Poor 4.2% of 71 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 Bia Rte 2 over Dawson Creek | 1932 | 100 | Poor |
| Irr Bia Rte 13 over South Fork Milk River | 1979 | 60 | Poor |
| Irr Bia Rte 191 over Two Medicine Creek | 1969 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Irr - US 2 over RR | 1997 | 3,716 | Good |
| Irr - US 2 over Cut Bank Creek | 2007 | 3,523 | Fair |
| Irr - US 2 over RR | 1997 | 2,515 | Good |
| Irr - US 89 over St Marys River | 1956 | 2,355 | Fair |
| Going-to-the-sun R over St. Mary River | 1934 | 2,300 | Fair |
| Going-to-the-sun R over Divide Creek | 1934 | 2,300 | Fair |
| US 2 over Two Medicine Irr Canal | 1942 | 2,130 | Fair |
| Irr - US 2 over Willow Creek | 1957 | 2,128 | Fair |
| Irr - US 2 over Flatiron Creek | 1957 | 2,128 | Fair |
| Irr - S 49 over Two Medicine River 001 | 1966 | 2,059 | 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.