NB I-35 over South River
GoodWarren County, Iowa · 1.7 Mi. N of Jct. SR G26 · Structure no. 000000000051221
- Built
- 2011
- 14 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 243 ft
- 3 main spans
- Daily traffic
- 9,950
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
NB I-35 over South River is a steel continuous stringer/multi-beam or girder carrying NB I-35 over South River in Warren County, Iowa. It was built in 2011, so it is 14 years old, younger 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 9,950 vehicles a day, roughly 30% of them trucks, projected to reach 9,950 by 2043. The structure is 243 ft (74.2 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NB I-35 over South River built?
It was built in 2011, making it 14 years old in 2025.
What condition is NB I-35 over South 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 August 2023.
How much traffic does NB I-35 over South River carry?
About 9,950 vehicles per day (2022 count), of which roughly 30% are trucks.
How long is NB I-35 over South River?
The structure is 243 ft (74.2 m) long with a longest span of 96 ft (29.3 m) and a deck 43 ft wide.
Who owns NB I-35 over South River?
It is owned by the State Highway Agency.