347th ST over I-80
FairDallas County, Iowa · 1.2 Mi. W of Jct. US 169 · Structure no. 000000000022270
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 292 ft
- 4 main spans
- Daily traffic
- 103
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
347th ST over I-80 is a steel continuous stringer/multi-beam or girder carrying 347th ST over I-80 in Dallas County, Iowa. It was built in 1966, so it is 59 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 6 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 103 vehicles a day, projected to reach 103 by 2043. The structure is 292 ft (89 m) long and 32 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 347th ST over I-80 built?
It was built in 1966, making it 59 years old in 2025.
What condition is 347th ST over I-80 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 September 2023.
How much traffic does 347th ST over I-80 carry?
About 103 vehicles per day (2022 count).
How long is 347th ST over I-80?
The structure is 292 ft (89 m) long with a longest span of 83 ft (25.3 m) and a deck 32 ft wide.
Who owns 347th ST over I-80?
It is owned by the State Highway Agency.