US 71 over East Nishnabotna River
FairAudubon County, Iowa · 0.2 Mi. S of SR F58 · Structure no. 000000000014111
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 278 ft
- 3 main spans
- Daily traffic
- 2,380
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 71 over East Nishnabotna River is a prestressed concrete stringer/multi-beam or girder carrying US 71 over East Nishnabotna River in Audubon County, Iowa. It was built in 1979, so it is 46 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 2,380 vehicles a day, roughly 21% of them trucks, projected to reach 2,380 by 2044. The structure is 278 ft (84.7 m) long and 47 ft wide. If it were closed, the detour would be 8.7 mi (14 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 |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 71 over East Nishnabotna River built?
It was built in 1979, making it 46 years old in 2025.
What condition is US 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 September 2024.
How much traffic does US 71 over East Nishnabotna River carry?
About 2,380 vehicles per day (2022 count), of which roughly 21% are trucks.
How long is US 71 over East Nishnabotna River?
The structure is 278 ft (84.7 m) long with a longest span of 92 ft (28 m) and a deck 47 ft wide.
Who owns US 71 over East Nishnabotna River?
It is owned by the State Highway Agency.