Minidoka County Bridge Report Card
Minidoka County scores 90 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Minidoka County, Idaho
Minidoka County has 67 bridges in the National Bridge Inventory, with 1 rated poor and 2 rated scour-critical. Its poor-condition share of 1.5% is at or below the 5.4% statewide average. Poor-condition bridges carry about 1,500 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Minidoka County a Bridge Condition Exposure Score of 90/100 (A). The county has 67 bridges in the National Bridge Inventory, including 1 in poor condition and 2 rated scour-critical. Poor-condition bridges carry about 1,500 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 | 1.5% | 3.0 |
| Poor-condition traffic exposure | 25 | 0.7% of measured traffic | 0.6 |
| Scour-critical bridge share | 20 | 3.0% | 6.0 |
| Average age vs national baseline | 10 | 41 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 202,940 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 | 1.5% |
| State Poor-Condition Share | 5.4% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 3.0% |
| Average Bridge Age | 41 years |
| Poor-Condition Traffic Exposure | 1,500 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Minidoka County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Stc2866;baseline R over Snake R.(montgomery Br) | Poor condition + traffic exposure | Poor | 1,500 | 1954 |
| 100 North Road over A Canal | Scour-critical foundation rating | Good | 150 | 2009 |
| I84 Ebl Wbl over B-4 Canal | High traffic | Good | 22,000 | 2024 |
| I 84 Ebl over Shodde Road Gs | High traffic | Fair | 11,000 | 1966 |
| I 84 Wbl over Shodde Road Gs | High traffic | Fair | 11,000 | 1966 |
| I 84 Ebl over B-4 Canal | High traffic | Fair | 11,000 | 1966 |
| I 84 Ebl over I 84b;uprr;heyburn Ic | High traffic | Fair | 10,500 | 1961 |
| I 84 Wbl over I 84b;uprr;heyburn Ic | High traffic | Fair | 10,500 | 1961 |
| I 84 Ebl over A Canal | High traffic | Fair | 9,750 | 1961 |
| I 84 Wbl over A Canal | High traffic | Fair | 9,750 | 1961 |
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.