510th ST over West Fork Little Sioux
PoorPosted for loadCherokee County, Iowa · 092422401 · Structure no. 000000000109330
- Built
- 1917
- 108 years old
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 30 ft
- 1 main span
- Daily traffic
- 5
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
510th ST over West Fork Little Sioux is a steel stringer/multi-beam or girder carrying 510th ST over West Fork Little Sioux in Cherokee County, Iowa. It was built in 1917, so it is 108 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 5 vehicles a day, projected to reach 5 by 2044. The structure is 30 ft (9.1 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| 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 510th ST over West Fork Little Sioux built?
It was built in 1917, making it 108 years old in 2025.
What condition is 510th ST over West Fork Little Sioux 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 October 2024.
How much traffic does 510th ST over West Fork Little Sioux carry?
About 5 vehicles per day (2022 count).
How long is 510th ST over West Fork Little Sioux?
The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 18 ft wide.
Who owns 510th ST over West Fork Little Sioux?
It is owned by the County Highway Agency.