US 71 over Four Mile Creek
FairCass County, Iowa · 2.1 Mi. N of N Jct. 92 · Structure no. 000000000017540
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected September 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 22 ft
- 2 main spans
- Daily traffic
- 2,280
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 71 over Four Mile Creek is a concrete continuous culvert carrying US 71 over Four Mile Creek in Cass County, Iowa. It was built in 1971, so it is 54 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 2,280 vehicles a day, roughly 18% of them trucks, projected to reach 2,280 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 11.8 mi (19 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 71 over Four Mile Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is US 71 over Four Mile Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.
How much traffic does US 71 over Four Mile Creek carry?
About 2,280 vehicles per day (2022 count), of which roughly 18% are trucks.
How long is US 71 over Four Mile Creek?
The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).
Who owns US 71 over Four Mile Creek?
It is owned by the State Highway Agency.