FM over Iowa River
PoorMarshall County, Iowa · 084172907 · Structure no. 000000000243310
- Built
- 1955
- 70 years old, rebuilt 1996
- Condition
- Poor
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 534 ft
- 5 main spans
- Daily traffic
- 2,838
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Iowa River is a steel continuous stringer/multi-beam or girder carrying FM over Iowa River in Marshall County, Iowa. It was built in 1955 and reconstructed in 1996, so it is 70 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 4 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.
It carries about 2,838 vehicles a day, roughly 13% of them trucks, projected to reach 2,838 by 2043. The structure is 534 ft (162.8 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM over Iowa River built?
It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1996.
What condition is FM over Iowa River 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 November 2023.
How much traffic does FM over Iowa River carry?
About 2,838 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is FM over Iowa River?
The structure is 534 ft (162.8 m) long with a longest span of 117 ft (35.7 m) and a deck 30 ft wide.
Who owns FM over Iowa River?
It is owned by the County Highway Agency.