470th ST over Little Sioux River
PoorPosted for loadClay County, Iowa · 094360906 · Structure no. 000000000115830
- Built
- 1907
- 118 years old, rebuilt 1960
- Condition
- Poor
- inspected April 2023
- Type
- Truss - Thru
- Steel
- Length
- 213 ft
- 1 main span
- Daily traffic
- 26
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
470th ST over Little Sioux River is a steel truss - thru carrying 470th ST over Little Sioux River in Clay County, Iowa. It was built in 1907 and reconstructed in 1960, so it is 118 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 3 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. Its operating status is: posted for load restriction.
It carries about 26 vehicles a day, projected to reach 26 by 2043. The structure is 213 ft (64.9 m) long and 16 ft wide. If it were closed, the detour would be 5 mi (8 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 470th ST over Little Sioux River built?
It was built in 1907, making it 118 years old in 2025. It was reconstructed in 1960.
What condition is 470th ST over Little Sioux 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 470th ST over Little Sioux River carry?
About 26 vehicles per day (2021 count).
How long is 470th ST over Little Sioux River?
The structure is 213 ft (64.9 m) long with a longest span of 100 ft (30.5 m) and a deck 16 ft wide.
Who owns 470th ST over Little Sioux River?
It is owned by the County Highway Agency.