FM - 660th over Seven Mile Creek
FairCass County, Iowa · 075353102 · Structure no. 000000000098391
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 165 ft
- 3 main spans
- Daily traffic
- 89
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM - 660th over Seven Mile Creek is a prestressed concrete stringer/multi-beam or girder carrying FM - 660th over Seven Mile Creek in Cass County, Iowa. It was built in 1979, so it is 46 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 89 vehicles a day, projected to reach 89 by 2044. The structure is 165 ft (50.3 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| 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 - 660th over Seven Mile Creek built?
It was built in 1979, making it 46 years old in 2025.
What condition is FM - 660th over Seven Mile 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 FM - 660th over Seven Mile Creek carry?
About 89 vehicles per day (2022 count).
How long is FM - 660th over Seven Mile Creek?
The structure is 165 ft (50.3 m) long with a longest span of 69 ft (21 m) and a deck 30 ft wide.
Who owns FM - 660th over Seven Mile Creek?
It is owned by the County Highway Agency.