FM 3170 Valley over Winnebago River
FairHancock County, Iowa · 097231606 · Structure no. 000000000174081
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected March 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 154 ft
- 3 main spans
- Daily traffic
- 190
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM 3170 Valley over Winnebago River is a prestressed concrete stringer/multi-beam or girder carrying FM 3170 Valley over Winnebago River in Hancock County, Iowa. It was built in 1974, so it is 51 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 190 vehicles a day, roughly 14% of them trucks, projected to reach 190 by 2043. The structure is 154 ft (46.9 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM 3170 Valley over Winnebago River built?
It was built in 1974, making it 51 years old in 2025.
What condition is FM 3170 Valley over Winnebago 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 March 2021.
How much traffic does FM 3170 Valley over Winnebago River carry?
About 190 vehicles per day (2022 count), of which roughly 14% are trucks.
How long is FM 3170 Valley over Winnebago River?
The structure is 154 ft (46.9 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.
Who owns FM 3170 Valley over Winnebago River?
It is owned by the County Highway Agency.