FM over Des Moines River
PoorBoone County, Iowa · 085271403 · Structure no. 000000000078350
- Built
- 1955
- 70 years old, rebuilt 1991
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 574 ft
- 6 main spans
- Daily traffic
- 709
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Des Moines River is a steel continuous stringer/multi-beam or girder carrying FM over Des Moines River in Boone County, Iowa. It was built in 1955 and reconstructed in 1991, 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 709 vehicles a day, roughly 8% of them trucks, projected to reach 709 by 2044. The structure is 574 ft (175 m) long and 33 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Des Moines River built?
It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1991.
What condition is FM over Des Moines 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 May 2024.
How much traffic does FM over Des Moines River carry?
About 709 vehicles per day (2022 count), of which roughly 8% are trucks.
How long is FM over Des Moines River?
The structure is 574 ft (175 m) long with a longest span of 103 ft (31.4 m) and a deck 33 ft wide.
Who owns FM over Des Moines River?
It is owned by the County Highway Agency.