FM over Cone Marsh
GoodLouisa County, Iowa · 076051403 · Structure no. 000000000224841
- Built
- 1985
- 40 years old
- Condition
- Good
- inspected May 2022
- Type
- Culvert
- Concrete Continuous
- Length
- 20 ft
- 2 main spans
- Daily traffic
- 70
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FM over Cone Marsh is a concrete continuous culvert carrying FM over Cone Marsh in Louisa County, Iowa. It was built in 1985, so it is 40 years old, younger than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 70 vehicles a day, projected to reach 70 by 2043. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM over Cone Marsh built?
It was built in 1985, making it 40 years old in 2025.
What condition is FM over Cone Marsh in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2022.
How much traffic does FM over Cone Marsh carry?
About 70 vehicles per day (2022 count).
How long is FM over Cone Marsh?
The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m).
Who owns FM over Cone Marsh?
It is owned by the County Highway Agency.