340th over Rock Creek
GoodMitchell County, Iowa · 097180103 · Structure no. 000000000247621
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected January 2024
- Type
- Slab
- Concrete Continuous
- Length
- 91 ft
- 3 main spans
- Daily traffic
- 44
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
340th over Rock Creek is a concrete continuous slab carrying 340th over Rock Creek in Mitchell County, Iowa. It was built in 1977, so it is 48 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 44 vehicles a day, projected to reach 44 by 2044. The structure is 91 ft (27.7 m) long and 32 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 340th over Rock Creek built?
It was built in 1977, making it 48 years old in 2025.
What condition is 340th over Rock Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.
How much traffic does 340th over Rock Creek carry?
About 44 vehicles per day (2022 count).
How long is 340th over Rock Creek?
The structure is 91 ft (27.7 m) long with a longest span of 34 ft (10.4 m) and a deck 32 ft wide.
Who owns 340th over Rock Creek?
It is owned by the County Highway Agency.