FM C-70 over West Fork Little Sioux
FairPlymouth County, Iowa · 090443503 · Structure no. 000000000271240
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 175 ft
- 3 main spans
- Daily traffic
- 459
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM C-70 over West Fork Little Sioux is a steel continuous stringer/multi-beam or girder carrying FM C-70 over West Fork Little Sioux in Plymouth County, Iowa. It was built in 1961, so it is 64 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 459 vehicles a day, projected to reach 459 by 2044. The structure is 175 ft (53.3 m) long and 26 ft wide. 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 |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM C-70 over West Fork Little Sioux built?
It was built in 1961, making it 64 years old in 2025.
What condition is FM C-70 over West Fork Little Sioux 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 August 2024.
How much traffic does FM C-70 over West Fork Little Sioux carry?
About 459 vehicles per day (2022 count).
How long is FM C-70 over West Fork Little Sioux?
The structure is 175 ft (53.3 m) long with a longest span of 68 ft (20.7 m) and a deck 26 ft wide.
Who owns FM C-70 over West Fork Little Sioux?
It is owned by the County Highway Agency.