Liberty County Bridge Report Card
Liberty County scores 80 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Liberty County, Montana
Liberty County has 10 bridges in the National Bridge Inventory, with 0 rated poor and 1 rated scour-critical. Its poor-condition share of 0.0% is at or below the 7.4% statewide average.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Liberty County a Bridge Condition Exposure Score of 80/100 (B). The county has 10 bridges in the National Bridge Inventory, including 0 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 0 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 | 0.0% | 0.0 |
| Poor-condition traffic exposure | 25 | 0.0% of measured traffic | 0.0 |
| Scour-critical bridge share | 20 | 10.0% | 20.0 |
| Average age vs national baseline | 10 | 48 years vs 48 nationally | 0.1 |
| Traffic-data completeness | 5 | 4,040 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 | 0.0% |
| State Poor-Condition Share | 7.4% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 10.0% |
| Average Bridge Age | 48 years |
| Poor-Condition Traffic Exposure | 0 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Liberty County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Broadhurst RD over Pondera Coulee 013 | Scour-critical foundation rating | Fair | 100 | 1977 |
| US 2 over Cottonwood Creek | High traffic | Fair | 2,325 | 1953 |
| S 223 over Cottonwood Creek | High traffic | Fair | 518 | 1960 |
| S 223 over Cottonwood Creek | High traffic | Fair | 409 | 1963 |
| S 223 over Marias River | High traffic | Fair | 270 | 1966 |
| Pugsley RD over Marias River 006 | High traffic | Fair | 100 | 1951 |
| Moffat RD over Marias River 011 | High traffic | Good | 100 | 1995 |
| Black Jack RD over Sage Creek 001 | High traffic | Good | 100 | 2006 |
| County RD 001 over Cottonwood Creek | High traffic | Good | 100 | 2020 |
| Bootlegger RD over Pondera Coulee | High traffic | Fair | 18 | 1984 |
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.