A30 460th ST over Union Slough Ditch
PoorKossuth County, Iowa · 099280201 · Structure no. 000000000033040
- Built
- 1951
- 74 years old, rebuilt 1988
- Condition
- Poor
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 123 ft
- 3 main spans
- Daily traffic
- 170
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
A30 460th ST over Union Slough Ditch is a steel continuous stringer/multi-beam or girder carrying A30 460th ST over Union Slough Ditch in Kossuth County, Iowa. It was built in 1951 and reconstructed in 1988, so it is 74 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 170 vehicles a day, roughly 19% of them trucks, projected to reach 170 by 2043. The structure is 123 ft (37.5 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was A30 460th ST over Union Slough Ditch built?
It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1988.
What condition is A30 460th ST over Union Slough Ditch 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 May 2023.
How much traffic does A30 460th ST over Union Slough Ditch carry?
About 170 vehicles per day (2021 count), of which roughly 19% are trucks.
How long is A30 460th ST over Union Slough Ditch?
The structure is 123 ft (37.5 m) long with a longest span of 47 ft (14.3 m) and a deck 36 ft wide.
Who owns A30 460th ST over Union Slough Ditch?
It is owned by the County Highway Agency.