I-35 over Calmus Creek
FairCerro Gordo County, Iowa · 0.7 Mi. N of Jct. SR B20 · Structure no. 000000000019260
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected February 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 27 ft
- 2 main spans
- Daily traffic
- 21,400
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-35 over Calmus Creek is a concrete continuous culvert carrying I-35 over Calmus Creek 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 fair condition with a lowest component rating of 6 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 21,400 vehicles a day, roughly 31% of them trucks, projected to reach 21,400 by 2043. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 8.1 mi (13 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-35 over Calmus Creek built?
It was built in 1970, making it 55 years old in 2025.
What condition is I-35 over Calmus Creek 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 February 2024.
How much traffic does I-35 over Calmus Creek carry?
About 21,400 vehicles per day (2023 count), of which roughly 31% are trucks.
How long is I-35 over Calmus Creek?
The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).
Who owns I-35 over Calmus Creek?
It is owned by the State Highway Agency.