320th Street over Stream
PoorPottawattamie County, Iowa · 076410904 · Structure no. 000000000288331
- Built
- 1976
- 49 years old
- Condition
- Poor
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 70 ft
- 3 main spans
- Daily traffic
- 20
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
320th Street over Stream is a wood or timber stringer/multi-beam or girder carrying 320th Street over Stream in Pottawattamie County, Iowa. It was built in 1976, so it is 49 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 20 vehicles a day, projected to reach 20 by 2043. The structure is 70 ft (21.3 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 320th Street over Stream built?
It was built in 1976, making it 49 years old in 2025.
What condition is 320th Street over Stream in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.
How much traffic does 320th Street over Stream carry?
About 20 vehicles per day (2022 count).
How long is 320th Street over Stream?
The structure is 70 ft (21.3 m) long with a longest span of 23 ft (7 m) and a deck 19 ft wide.
Who owns 320th Street over Stream?
It is owned by the County Highway Agency.