Washington County Bridge Report Card
Washington County scores 77 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Washington County, Idaho
Washington County has 80 bridges in the National Bridge Inventory, with 4 rated poor and 5 rated scour-critical. Its poor-condition share of 5.0% is at or below the 5.4% statewide average. Poor-condition bridges carry about 740 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Washington County a Bridge Condition Exposure Score of 77/100 (C). The county has 80 bridges in the National Bridge Inventory, including 4 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 740 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 | 5.0% | 10.0 |
| Poor-condition traffic exposure | 25 | 0.9% of measured traffic | 0.7 |
| Scour-critical bridge share | 20 | 6.2% | 12.5 |
| Average age vs national baseline | 10 | 45 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 83,700 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 | 5.0% |
| State Poor-Condition Share | 5.4% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 6.2% |
| Average Bridge Age | 45 years |
| Poor-Condition Traffic Exposure | 740 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Washington County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Stc 8217;cove Road over Weiser River | Poor condition + traffic exposure | Poor | 490 | 1917 |
| Stc 3007;unity RD over Weiser River | Poor condition + traffic exposure | Poor | 180 | 1910 |
| Sage Creek Road over Sage Creek | Poor condition + traffic exposure | Poor | 50 | 1965 |
| Lower Crane Road over Crane Creek | Poor condition + traffic exposure | Poor | 20 | 1955 |
| US 95 over Dry Creek | Scour-critical foundation rating | Fair | 4,400 | 1964 |
| US 95 over Weiser River | Scour-critical foundation rating | Fair | 3,200 | 1954 |
| US 95 over Rush Creek | Scour-critical foundation rating | Fair | 3,200 | 1956 |
| Stc8215;weiser Rvr over Manns Creek | Scour-critical foundation rating | Fair | 330 | 1954 |
| N Crane Road over Crane Creek | Scour-critical foundation rating | Fair | 50 | 2015 |
| US 95 over Robertson Slough | High traffic | Good | 7,800 | 2017 |
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.