Ia 4 over Reading Creek
FairCalhoun County, Iowa · 3.1 Mi. S of S JCT Ia 175 · Structure no. 000000000016900
- Built
- 1952
- 73 years old
- Condition
- Fair
- inspected May 2024
- Type
- Slab
- Concrete Continuous
- Length
- 82 ft
- 3 main spans
- Daily traffic
- 300
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 4 over Reading Creek is a concrete continuous slab carrying Ia 4 over Reading Creek in Calhoun County, Iowa. It was built in 1952, so it is 73 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 300 vehicles a day, roughly 14% of them trucks, projected to reach 300 by 2044. The structure is 82 ft (25 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Ia 4 over Reading Creek built?
It was built in 1952, making it 73 years old in 2025.
What condition is Ia 4 over Reading 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 Ia 4 over Reading Creek carry?
About 300 vehicles per day (2022 count), of which roughly 14% are trucks.
How long is Ia 4 over Reading Creek?
The structure is 82 ft (25 m) long with a longest span of 31 ft (9.4 m) and a deck 35 ft wide.
Who owns Ia 4 over Reading Creek?
It is owned by the State Highway Agency.