WB I-235 over Walnut Creek
FairPolk County, Iowa · 3.4 MI E of W JCT 35/80 · Structure no. 000000000042280
- Built
- 1968
- 57 years old, rebuilt 1986
- Condition
- Fair
- inspected May 2024
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 336 ft
- 3 main spans
- Daily traffic
- 58,050
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
WB I-235 over Walnut Creek is a steel continuous girder and floorbeam system carrying WB I-235 over Walnut Creek in Polk County, Iowa. It was built in 1968 and reconstructed in 1986, so it is 57 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 58,050 vehicles a day, roughly 6% of them trucks, projected to reach 58,050 by 2044. The structure is 336 ft (102.4 m) long and 73 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was WB I-235 over Walnut Creek built?
It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1986.
What condition is WB I-235 over Walnut 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 May 2024.
How much traffic does WB I-235 over Walnut Creek carry?
About 58,050 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is WB I-235 over Walnut Creek?
The structure is 336 ft (102.4 m) long with a longest span of 129 ft (39.3 m) and a deck 73 ft wide.
Who owns WB I-235 over Walnut Creek?
It is owned by the State Highway Agency.