320th over Little Cedar River
PoorPosted for loadMitchell County, Iowa · 097161303 · Structure no. 000000000247430
- Built
- 1931
- 94 years old
- Condition
- Poor
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 169 ft
- 4 main spans
- Daily traffic
- 226
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
320th over Little Cedar River is a steel stringer/multi-beam or girder carrying 320th over Little Cedar River in Mitchell County, Iowa. It was built in 1931, so it is 94 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. Its operating status is: posted for load restriction.
It carries about 226 vehicles a day, projected to reach 226 by 2044. The structure is 169 ft (51.5 m) long and 23 ft wide. If it were closed, the detour would be 18 mi (29 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 320th over Little Cedar River built?
It was built in 1931, making it 94 years old in 2025.
What condition is 320th over Little Cedar 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 January 2024.
How much traffic does 320th over Little Cedar River carry?
About 226 vehicles per day (2022 count).
How long is 320th over Little Cedar River?
The structure is 169 ft (51.5 m) long with a longest span of 42 ft (12.8 m) and a deck 23 ft wide.
Who owns 320th over Little Cedar River?
It is owned by the County Highway Agency.