Ia 28 over Walnut Creek
GoodPolk County, Iowa · 0.4 Mi. S of Jct. I-235 · Structure no. 000000000003826
- Built
- 1969
- 56 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 246 ft
- 3 main spans
- Daily traffic
- 25,900
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 28 over Walnut Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 28 over Walnut Creek in Polk County, Iowa. It was built in 1969, so it is 56 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 25,900 vehicles a day, roughly 5% of them trucks, projected to reach 25,900 by 2044. The structure is 246 ft (75 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ia 28 over Walnut Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is Ia 28 over Walnut Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.
How much traffic does Ia 28 over Walnut Creek carry?
About 25,900 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Ia 28 over Walnut Creek?
The structure is 246 ft (75 m) long with a longest span of 82 ft (25 m) and a deck 66 ft wide.
Who owns Ia 28 over Walnut Creek?
It is owned by the State Highway Agency.