M Ave over Iowa River
PoorIowa County, Iowa · 081101902 · Structure no. 000000000361680
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,265 ft
- 15 main spans
- Daily traffic
- 2,340
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
M Ave over Iowa River is a steel continuous stringer/multi-beam or girder carrying M Ave over Iowa River in Iowa County, Iowa. It was built in 1950, so it is 75 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 2,340 vehicles a day, roughly 11% of them trucks, projected to reach 2,340 by 2044. The structure is 1,265 ft (385.6 m) long and 32 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 M Ave over Iowa River built?
It was built in 1950, making it 75 years old in 2025.
What condition is M Ave 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 March 2024.
How much traffic does M Ave over Iowa River carry?
About 2,340 vehicles per day (2022 count), of which roughly 11% are trucks.
How long is M Ave over Iowa River?
The structure is 1,265 ft (385.6 m) long with a longest span of 125 ft (38.1 m) and a deck 32 ft wide.
Who owns M Ave over Iowa River?
It is owned by the County Highway Agency.