Audubon County Bridge Report Card
Audubon County scores 55 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Audubon County, Iowa
Audubon County has 204 bridges in the National Bridge Inventory, with 37 rated poor and 2 rated scour-critical. Its poor-condition share of 18.1% is at or below the 18.6% statewide average. Poor-condition bridges carry about 1,955 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Audubon County a Bridge Condition Exposure Score of 55/100 (F). The county has 204 bridges in the National Bridge Inventory, including 37 in poor condition and 2 rated scour-critical. Poor-condition bridges carry about 1,955 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 | 18.1% | 36.3 |
| Poor-condition traffic exposure | 25 | 4.1% of measured traffic | 3.1 |
| Scour-critical bridge share | 20 | 1.0% | 2.0 |
| Average age vs national baseline | 10 | 56 years vs 48 nationally | 3.5 |
| Traffic-data completeness | 5 | 47,229 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 | 18.1% |
| State Poor-Condition Share | 18.6% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.0% |
| Average Bridge Age | 56 years |
| Poor-Condition Traffic Exposure | 1,955 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Audubon County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Local over Elkhorn Creek | Poor condition + traffic exposure | Poor | 62 | 1973 |
| 1st ST over Drainage | Poor condition + traffic exposure | Poor | 9 | 1930 |
| Edgerton ST over Drainage | Poor condition + traffic exposure | Poor | 616 | 1960 |
| Local over Drainage | Poor condition + traffic exposure | Poor | 226 | 1945 |
| Local over Creek | Poor condition + traffic exposure | Poor | 216 | 1934 |
| FM over Creek | Poor condition + traffic exposure | Poor | 60 | 1920 |
| FM F-65 over Crooked Creek | Poor condition + traffic exposure | Poor | 60 | 1936 |
| 120th ST over Creek | Poor condition + traffic exposure | Poor | 35 | 1941 |
| Local over Nishnabotna River | Poor condition + traffic exposure | Poor | 35 | 1958 |
| Local over E Nishnabotna River | Poor condition + traffic exposure | Poor | 35 | 1971 |
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.