170 Street over West Nishnabotna River
PoorFremont County, Iowa · 069410801 · Structure no. 000000000160070
- Built
- 1960
- 65 years old
- Condition
- Poor
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 344 ft
- 3 main spans
- Daily traffic
- 72
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
170 Street over West Nishnabotna River is a steel continuous stringer/multi-beam or girder carrying 170 Street over West Nishnabotna River in Fremont County, Iowa. It was built in 1960, so it is 65 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 72 vehicles a day, roughly 18% of them trucks, projected to reach 72 by 2043. The structure is 344 ft (104.9 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 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 170 Street over West Nishnabotna River built?
It was built in 1960, making it 65 years old in 2025.
What condition is 170 Street over West Nishnabotna 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 2023.
How much traffic does 170 Street over West Nishnabotna River carry?
About 72 vehicles per day (2021 count), of which roughly 18% are trucks.
How long is 170 Street over West Nishnabotna River?
The structure is 344 ft (104.9 m) long with a longest span of 133 ft (40.5 m) and a deck 22 ft wide.
Who owns 170 Street over West Nishnabotna River?
It is owned by the County Highway Agency.