FM over Maple River
PoorPosted for loadMonona County, Iowa · 083441504 · Structure no. 000000000250150
- Built
- 1960
- 65 years old
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 305 ft
- 3 main spans
- Daily traffic
- 150
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Maple River is a steel continuous stringer/multi-beam or girder carrying FM over Maple River in Monona County, Iowa. It was built in 1960, so it is 65 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 3 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: posted for load restriction.
It carries about 150 vehicles a day, roughly 13% of them trucks, projected to reach 150 by 2044. The structure is 305 ft (93 m) long and 26 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 Maple River built?
It was built in 1960, making it 65 years old in 2025.
What condition is FM over Maple 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 Maple River carry?
About 150 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is FM over Maple River?
The structure is 305 ft (93 m) long with a longest span of 117 ft (35.7 m) and a deck 26 ft wide.
Who owns FM over Maple River?
It is owned by the County Highway Agency.