400th Street over Drainage
FairPottawattamie County, Iowa · 077401102 · Structure no. 000000000289860
- Built
- 1948
- 77 years old, rebuilt 1992
- Condition
- Fair
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 54 ft
- 3 main spans
- Daily traffic
- 40
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
400th Street over Drainage is a wood or timber stringer/multi-beam or girder carrying 400th Street over Drainage in Pottawattamie County, Iowa. It was built in 1948 and reconstructed in 1992, so it is 77 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 40 vehicles a day, projected to reach 40 by 2043. The structure is 54 ft (16.5 m) long and 19 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 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 | 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 400th Street over Drainage built?
It was built in 1948, making it 77 years old in 2025. It was reconstructed in 1992.
What condition is 400th Street over Drainage 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 May 2023.
How much traffic does 400th Street over Drainage carry?
About 40 vehicles per day (2021 count).
How long is 400th Street over Drainage?
The structure is 54 ft (16.5 m) long with a longest span of 23 ft (7 m) and a deck 19 ft wide.
Who owns 400th Street over Drainage?
It is owned by the County Highway Agency.