SB I-35 over Grand River
FairDecatur County, Iowa · 3.1 Mi. N of Jct. US 69 · Structure no. 000000000022930
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 365 ft
- 3 main spans
- Daily traffic
- 7,700
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SB I-35 over Grand River is a steel continuous stringer/multi-beam or girder carrying SB I-35 over Grand River in Decatur 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 7,700 vehicles a day, roughly 37% of them trucks, projected to reach 7,700 by 2043. The structure is 365 ft (111.3 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
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SB I-35 over Grand River built?
It was built in 1970, making it 55 years old in 2025.
What condition is SB I-35 over Grand River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.
How much traffic does SB I-35 over Grand River carry?
About 7,700 vehicles per day (2023 count), of which roughly 37% are trucks.
How long is SB I-35 over Grand River?
The structure is 365 ft (111.3 m) long with a longest span of 140 ft (42.7 m) and a deck 43 ft wide.
Who owns SB I-35 over Grand River?
It is owned by the State Highway Agency.