320 TH over Stream
PoorPosted for loadGreene County, Iowa · 082322801 · Structure no. 000000000161980
- Built
- 1956
- 69 years old
- Condition
- Poor
- inspected July 2024
- Type
- Slab
- Concrete Continuous
- Length
- 77 ft
- 3 main spans
- Daily traffic
- 11
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
320 TH over Stream is a concrete continuous slab carrying 320 TH over Stream in Greene County, Iowa. It was built in 1956, so it is 69 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. Its operating status is: posted for load restriction.
It carries about 11 vehicles a day, roughly 18% of them trucks, projected to reach 11 by 2044. The structure is 77 ft (23.5 m) long and 22 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 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, 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 320 TH over Stream built?
It was built in 1956, making it 69 years old in 2025.
What condition is 320 TH 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 July 2024.
How much traffic does 320 TH over Stream carry?
About 11 vehicles per day (2022 count), of which roughly 18% are trucks.
How long is 320 TH over Stream?
The structure is 77 ft (23.5 m) long with a longest span of 29 ft (8.8 m) and a deck 22 ft wide.
Who owns 320 TH over Stream?
It is owned by the County Highway Agency.