FM over Des Moines River
PoorBoone County, Iowa · 083262905 · Structure no. 000000000077405
- Built
- 1972
- 53 years old
- Condition
- Poor
- inspected May 2024
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 723 ft
- 5 main spans
- Daily traffic
- 769
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Des Moines River is a steel continuous girder and floorbeam system carrying FM over Des Moines River in Boone County, Iowa. It was built in 1972, so it is 53 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 769 vehicles a day, roughly 11% of them trucks, projected to reach 769 by 2044. The structure is 723 ft (220.4 m) long and 32 ft wide. If it were closed, the detour would be 18 mi (29 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 1972, making it 53 years old in 2025.
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 769 vehicles per day (2022 count), of which roughly 11% are trucks.
How long is FM over Des Moines River?
The structure is 723 ft (220.4 m) long with a longest span of 152 ft (46.3 m) and a deck 32 ft wide.
Who owns FM over Des Moines River?
It is owned by the County Highway Agency.