NB I-35 over Winnebago River
GoodCerro Gordo County, Iowa · 2.3 Mi. S of Jct. Ia 9 · Structure no. 000000000019280
- Built
- 1970
- 55 years old
- Condition
- Good
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 247 ft
- 3 main spans
- Daily traffic
- 10,700
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NB I-35 over Winnebago River is a prestressed concrete stringer/multi-beam or girder carrying NB I-35 over Winnebago River in Cerro Gordo County, Iowa. It was built in 1970, so it is 55 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 10,700 vehicles a day, roughly 31% of them trucks, projected to reach 10,700 by 2043. The structure is 247 ft (75.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 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 NB I-35 over Winnebago River built?
It was built in 1970, making it 55 years old in 2025.
What condition is NB I-35 over Winnebago 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 March 2024.
How much traffic does NB I-35 over Winnebago River carry?
About 10,700 vehicles per day (2023 count), of which roughly 31% are trucks.
How long is NB I-35 over Winnebago River?
The structure is 247 ft (75.3 m) long with a longest span of 82 ft (25 m) and a deck 43 ft wide.
Who owns NB I-35 over Winnebago River?
It is owned by the State Highway Agency.