US 34 over Twelve Mile Creek
FairUnion County, Iowa · 3.2 Mi. W of W JCT US 169 · Structure no. 000000000050040
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 171 ft
- 3 main spans
- Daily traffic
- 4,890
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US 34 over Twelve Mile Creek is a prestressed concrete stringer/multi-beam or girder carrying US 34 over Twelve Mile Creek in Union County, Iowa. It was built in 1971, so it is 54 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 4,890 vehicles a day, roughly 14% of them trucks, projected to reach 4,890 by 2043. The structure is 171 ft (52.1 m) long and 47 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 34 over Twelve Mile Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is US 34 over Twelve Mile Creek 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 June 2023.
How much traffic does US 34 over Twelve Mile Creek carry?
About 4,890 vehicles per day (2021 count), of which roughly 14% are trucks.
How long is US 34 over Twelve Mile Creek?
The structure is 171 ft (52.1 m) long with a longest span of 69 ft (21 m) and a deck 47 ft wide.
Who owns US 34 over Twelve Mile Creek?
It is owned by the State Highway Agency.