Woodbury County Bridge Report Card
Woodbury County scores 44 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Woodbury County, Iowa
Woodbury County has 455 bridges in the National Bridge Inventory, with 95 rated poor and 28 rated scour-critical. Its poor-condition share of 20.9% is above the 18.6% statewide average. Poor-condition bridges carry about 67,160 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Woodbury County a Bridge Condition Exposure Score of 44/100 (F). The county has 455 bridges in the National Bridge Inventory, including 95 in poor condition and 28 rated scour-critical. Poor-condition bridges carry about 67,160 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 | 20.9% | 40.0 |
| Poor-condition traffic exposure | 25 | 5.2% of measured traffic | 3.9 |
| Scour-critical bridge share | 20 | 6.2% | 12.3 |
| Average age vs national baseline | 10 | 40 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 1,288,977 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 | 20.9% |
| State Poor-Condition Share | 18.6% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 6.2% |
| Average Bridge Age | 40 years |
| Poor-Condition Traffic Exposure | 67,160 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Woodbury County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| FM over Muddy Creek | Poor condition + traffic exposure | Poor | 628 | 1967 |
| FM over Big Creek | Poor condition + traffic exposure | Poor | 369 | 1962 |
| FM over Big Creek | Poor condition + traffic exposure | Poor | 270 | 1964 |
| FM over Stream | Poor condition + traffic exposure | Poor | 270 | 1981 |
| Local over Muddy Creek | Poor condition + traffic exposure | Poor | 60 | 1970 |
| Local over Stream | Poor condition + traffic exposure | Poor | 60 | 1980 |
| FM over Creek | Poor condition + traffic exposure | Poor | 50 | 1978 |
| Emmett AVE over Deer Creek | Poor condition + traffic exposure | Poor | 45 | 1977 |
| FM over Wolf Creek | Poor condition + traffic exposure | Poor | 40 | 1956 |
| Local over Big Whiskey Creek | Poor condition + traffic exposure | Poor | 30 | 1953 |
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.