Montgomery County Bridge Report Card
Montgomery County scores 44 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Montgomery County, Iowa
Montgomery County has 209 bridges in the National Bridge Inventory, with 52 rated poor and 9 rated scour-critical. Its poor-condition share of 24.9% is above the 18.6% statewide average. Poor-condition bridges carry about 6,749 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Montgomery County a Bridge Condition Exposure Score of 44/100 (F). The county has 209 bridges in the National Bridge Inventory, including 52 in poor condition and 9 rated scour-critical. Poor-condition bridges carry about 6,749 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 | 24.9% | 40.0 |
| Poor-condition traffic exposure | 25 | 7.2% of measured traffic | 5.4 |
| Scour-critical bridge share | 20 | 4.3% | 8.6 |
| Average age vs national baseline | 10 | 52 years vs 48 nationally | 1.8 |
| Traffic-data completeness | 5 | 94,194 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 | 24.9% |
| State Poor-Condition Share | 18.6% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 4.3% |
| Average Bridge Age | 52 years |
| Poor-Condition Traffic Exposure | 6,749 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Montgomery County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Local Road over Minor Drainage | Poor condition + traffic exposure | Poor | 61 | 1930 |
| FM over Nishnabotna | Poor condition + traffic exposure | Poor | 60 | 1942 |
| Local RD over W Nodaway River | Poor condition + traffic exposure | Poor | 26 | 1970 |
| Local over Trib Tarkio | Poor condition + traffic exposure | Poor | 5 | 1955 |
| Local over Small Stream | Poor condition + traffic exposure | Poor | 5 | 1985 |
| Old US 71 over Bnsf Rr | Poor condition + traffic exposure | Poor | 1,187 | 1929 |
| 4th ST over Red Oak Creek | Poor condition + traffic exposure | Poor | 861 | 1965 |
| FM over Walnut Creek | Poor condition + traffic exposure | Poor | 750 | 1967 |
| FM over Walnut Creek | Poor condition + traffic exposure | Poor | 528 | 1956 |
| Third ST over Middle Nodaway | Poor condition + traffic exposure | Poor | 415 | 1939 |
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.