Glacier County Bridge Report Card
Glacier County scores 77 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Glacier County, Montana
Glacier County has 71 bridges in the National Bridge Inventory, with 3 rated poor and 5 rated scour-critical. Its poor-condition share of 4.2% is at or below the 7.4% statewide average. Poor-condition bridges carry about 210 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Glacier County a Bridge Condition Exposure Score of 77/100 (C). The county has 71 bridges in the National Bridge Inventory, including 3 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 210 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 4.2% | 8.5 |
| Poor-condition traffic exposure | 25 | 0.3% of measured traffic | 0.3 |
| Scour-critical bridge share | 20 | 7.0% | 14.1 |
| Average age vs national baseline | 10 | 48 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 62,753 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 4.2% |
| State Poor-Condition Share | 7.4% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 7.0% |
| Average Bridge Age | 48 years |
| Poor-Condition Traffic Exposure | 210 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Glacier County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| IRR BIA RTE 2 over Dawson Creek | Poor condition + traffic exposure | Poor | 100 | 1932 |
| IRR BIA RTE 13 over South Fork Milk River | Poor condition + traffic exposure | Poor | 60 | 1979 |
| IRR BIA RTE 191 over Two Medicine Creek | Poor condition + traffic exposure | Poor | 50 | 1969 |
| Going-to-the-sun R over Divide Creek | Scour-critical foundation rating | Fair | 2,300 | 1934 |
| Many Glacier Road over Apikuni Creek | Scour-critical foundation rating | Fair | 452 | 1931 |
| Two Medicine Road over Appistoki Creek | Scour-critical foundation rating | Fair | 183 | 1929 |
| Two Medicine Road over Two Medicine River | Scour-critical foundation rating | Fair | 183 | 1950 |
| Sullivan Bridge RD over Marias River 030 | Scour-critical foundation rating | Fair | 100 | 1968 |
| IRR - US 2 over Rr | High traffic | Good | 3,716 | 1997 |
| IRR - US 2 over Cut Bank Creek | High traffic | Fair | 3,523 | 2007 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.