Irr-Fm over Iowa River
PoorTama County, Iowa · 083153007 · Structure no. 000000000318261
- Built
- 1988
- 37 years old
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 604 ft
- 7 main spans
- Daily traffic
- 619
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Irr-Fm over Iowa River is a prestressed concrete stringer/multi-beam or girder carrying Irr-Fm over Iowa River in Tama County, Iowa. It was built in 1988, so it is 37 years old, younger 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 619 vehicles a day, roughly 13% of them trucks, projected to reach 619 by 2044. The structure is 604 ft (184.1 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Irr-Fm over Iowa River built?
It was built in 1988, making it 37 years old in 2025.
What condition is Irr-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 October 2024.
How much traffic does Irr-Fm over Iowa River carry?
About 619 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is Irr-Fm over Iowa River?
The structure is 604 ft (184.1 m) long with a longest span of 98 ft (29.9 m) and a deck 33 ft wide.
Who owns Irr-Fm over Iowa River?
It is owned by the County Highway Agency.