450th over Shellrock River
GoodWorth County, Iowa · 099200901 · Structure no. 000000000356050
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 169 ft
- 3 main spans
- Daily traffic
- 79
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
450th over Shellrock River is a prestressed concrete stringer/multi-beam or girder carrying 450th over Shellrock River in Worth County, Iowa. It was built in 1964, so it is 61 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 79 vehicles a day, projected to reach 79 by 2043. The structure is 169 ft (51.5 m) long and 30 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 450th over Shellrock River built?
It was built in 1964, making it 61 years old in 2025.
What condition is 450th 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 November 2023.
How much traffic does 450th over Shellrock River carry?
About 79 vehicles per day (2022 count).
How long is 450th over Shellrock River?
The structure is 169 ft (51.5 m) long with a longest span of 56 ft (17.1 m) and a deck 30 ft wide.
Who owns 450th over Shellrock River?
It is owned by the County Highway Agency.