390th over Shellrock River
PoorWorth County, Iowa · 098201201 · Structure no. 000000000355620
- Built
- 1958
- 67 years old, rebuilt 2008
- Condition
- Poor
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 182 ft
- 3 main spans
- Daily traffic
- 363
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
390th over Shellrock River is a prestressed concrete stringer/multi-beam or girder carrying 390th over Shellrock River in Worth County, Iowa. It was built in 1958 and reconstructed in 2008, 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 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 363 vehicles a day, roughly 21% of them trucks, projected to reach 363 by 2043. The structure is 182 ft (55.5 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 390th over Shellrock River built?
It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2008.
What condition is 390th over Shellrock 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 December 2023.
How much traffic does 390th over Shellrock River carry?
About 363 vehicles per day (2022 count), of which roughly 21% are trucks.
How long is 390th over Shellrock River?
The structure is 182 ft (55.5 m) long with a longest span of 68 ft (20.7 m) and a deck 28 ft wide.
Who owns 390th over Shellrock River?
It is owned by the County Highway Agency.