Judith Basin County Bridge Report Card
Judith Basin County scores 59 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Judith Basin County, Montana
Judith Basin County has 45 bridges in the National Bridge Inventory, with 7 rated poor and 2 rated scour-critical. Its poor-condition share of 15.6% is above the 7.4% statewide average. Poor-condition bridges carry about 406 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Judith Basin County a Bridge Condition Exposure Score of 59/100 (F). The county has 45 bridges in the National Bridge Inventory, including 7 in poor condition and 2 rated scour-critical. Poor-condition bridges carry about 406 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 | 15.6% | 31.1 |
| Poor-condition traffic exposure | 25 | 1.1% of measured traffic | 0.9 |
| Scour-critical bridge share | 20 | 4.4% | 8.9 |
| Average age vs national baseline | 10 | 47 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 35,809 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 | 15.6% |
| State Poor-Condition Share | 7.4% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 4.4% |
| Average Bridge Age | 47 years |
| Poor-Condition Traffic Exposure | 406 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Judith Basin County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Nfsr #487 over S Fk Judith River | Poor condition + traffic exposure | Poor | 65 | 1958 |
| Nfsr #487 over S Fk Judith River | Poor condition + traffic exposure | Poor | 65 | 1958 |
| Nfsr #487 over S Fk Judith River | Poor condition + traffic exposure | Poor | 65 | 1958 |
| Nfsr #487 over S Fk Judith River | Poor condition + traffic exposure | Poor | 65 | 1958 |
| Nfsr #487 over S Fk Judith River | Poor condition + traffic exposure | Poor | 65 | 1958 |
| Nfsr #487 over S Fk Judith River | Poor condition + traffic exposure | Poor | 65 | 1958 |
| Birch RD over Ross Fork Creek 018 | Poor condition + traffic exposure | Poor | 16 | 1925 |
| Indian Butte RD over Louse Creek 037 | Scour-critical foundation rating | Good | 100 | 2009 |
| US 87 over Ross Fork Creek | High traffic | Good | 3,335 | 1971 |
| US 87 over Dawkins Branch | High traffic | Good | 3,335 | 2021 |
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.