US 6 & 71 over East Nishnabotna River
FairCass County, Iowa · 2.3 Mi. W of Jct. I-80 · Structure no. 000000000017580
- Built
- 1959
- 66 years old, rebuilt 2017
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 285 ft
- 3 main spans
- Daily traffic
- 2,270
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 6 & 71 over East Nishnabotna River is a steel continuous stringer/multi-beam or girder carrying US 6 & 71 over East Nishnabotna River in Cass County, Iowa. It was built in 1959 and reconstructed in 2017, so it is 66 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 5 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 2,270 vehicles a day, roughly 21% of them trucks, projected to reach 2,270 by 2042. The structure is 285 ft (86.9 m) long and 35 ft wide.
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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| 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 US 6 & 71 over East Nishnabotna River built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2017.
What condition is US 6 & 71 over East Nishnabotna River 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 July 2023.
How much traffic does US 6 & 71 over East Nishnabotna River carry?
About 2,270 vehicles per day (2022 count), of which roughly 21% are trucks.
How long is US 6 & 71 over East Nishnabotna River?
The structure is 285 ft (86.9 m) long with a longest span of 109 ft (33.2 m) and a deck 35 ft wide.
Who owns US 6 & 71 over East Nishnabotna River?
It is owned by the State Highway Agency.