Ia 141 & 175 over Maple River
PoorMonona County, Iowa · 0.1 Mi. E of W JCT Ia 175 · Structure no. 000000000036750
- Built
- 1967
- 58 years old
- Condition
- Poor
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 305 ft
- 3 main spans
- Daily traffic
- 3,720
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 141 & 175 over Maple River is a steel continuous stringer/multi-beam or girder carrying Ia 141 & 175 over Maple River in Monona County, Iowa. It was built in 1967, so it is 58 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 3,720 vehicles a day, roughly 11% of them trucks, projected to reach 3,720 by 2043. The structure is 305 ft (93 m) long and 36 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ia 141 & 175 over Maple River built?
It was built in 1967, making it 58 years old in 2025.
What condition is Ia 141 & 175 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 April 2024.
How much traffic does Ia 141 & 175 over Maple River carry?
About 3,720 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is Ia 141 & 175 over Maple River?
The structure is 305 ft (93 m) long with a longest span of 117 ft (35.7 m) and a deck 36 ft wide.
Who owns Ia 141 & 175 over Maple River?
It is owned by the State Highway Agency.