Co. Highway over Des Moines River
FairMarion County, Iowa · Red Rock Dam · Structure no. 240385
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 237 ft
- 5 main spans
- Daily traffic
- 3,750
- 2020 count
- Owner
- Federal
- Corps of Engineers (Civil)
About this bridge
Co. Highway over Des Moines River is a prestressed concrete stringer/multi-beam or girder carrying Co. Highway over Des Moines River in Marion County, Iowa. It was built in 1967, so it is 58 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 3,750 vehicles a day, roughly 5% of them trucks, projected to reach 4,100 by 2041. The structure is 237 ft (72.2 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Co. Highway over Des Moines River built?
It was built in 1967, making it 58 years old in 2025.
What condition is Co. Highway over Des Moines 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 July 2024.
How much traffic does Co. Highway over Des Moines River carry?
About 3,750 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is Co. Highway over Des Moines River?
The structure is 237 ft (72.2 m) long with a longest span of 37 ft (11.3 m) and a deck 36 ft wide.
Who owns Co. Highway over Des Moines River?
It is owned by the Corps of Engineers (Civil).