FM over Nishnabotna
PoorClosed to trafficMontgomery County, Iowa · 071381901 · Structure no. 000000000254720
- Built
- 1942
- 83 years old, rebuilt 1959
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 284 ft
- 3 main spans
- Daily traffic
- 60
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Nishnabotna is a steel continuous stringer/multi-beam or girder carrying FM over Nishnabotna in Montgomery County, Iowa. It was built in 1942 and reconstructed in 1959, so it is 83 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.
It carries about 60 vehicles a day, projected to reach 60 by 2044. The structure is 284 ft (86.6 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 0 Failed | Out of service and beyond corrective action. |
| Superstructure | 0 Failed | Out of service and beyond corrective action. |
| Substructure | 0 Failed | Out of service and beyond corrective action. |
| Channel and channel protection | 1 Imminent Failure | Major deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM over Nishnabotna built?
It was built in 1942, making it 83 years old in 2025. It was reconstructed in 1959.
What condition is FM over Nishnabotna in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does FM over Nishnabotna carry?
About 60 vehicles per day (2022 count).
How long is FM over Nishnabotna?
The structure is 284 ft (86.6 m) long with a longest span of 94 ft (28.7 m) and a deck 24 ft wide.
Who owns FM over Nishnabotna?
It is owned by the County Highway Agency.