400th over Shellrock River
GoodWorth County, Iowa · 098200103 · Structure no. 000000000355580
- Built
- 1958
- 67 years old
- Condition
- Good
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 182 ft
- 3 main spans
- Daily traffic
- 47
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
400th over Shellrock River is a prestressed concrete stringer/multi-beam or girder carrying 400th over Shellrock River in Worth County, Iowa. It was built in 1958, so it is 67 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 47 vehicles a day, projected to reach 47 by 2043. The structure is 182 ft (55.5 m) long and 28 ft wide. If it were closed, the detour would be 13 mi (21 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 400th over Shellrock River built?
It was built in 1958, making it 67 years old in 2025.
What condition is 400th over Shellrock River 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 December 2023.
How much traffic does 400th over Shellrock River carry?
About 47 vehicles per day (2022 count).
How long is 400th over Shellrock River?
The structure is 182 ft (55.5 m) long with a longest span of 69 ft (21 m) and a deck 28 ft wide.
Who owns 400th over Shellrock River?
It is owned by the County Highway Agency.