W66 over Big Slough Creek
GoodLouisa County, Iowa · 074050804 · Structure no. 000000000224231
- Built
- 2021
- 4 years old
- Condition
- Good
- inspected June 2023
- Type
- Slab
- Concrete Continuous
- Length
- 93 ft
- 3 main spans
- Daily traffic
- 190
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
W66 over Big Slough Creek is a concrete continuous slab carrying W66 over Big Slough Creek in Louisa County, Iowa. It was built in 2021, so it is 4 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 190 vehicles a day, roughly 16% of them trucks, projected to reach 190 by 2043. The structure is 93 ft (28.3 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was W66 over Big Slough Creek built?
It was built in 2021, making it 4 years old in 2025.
What condition is W66 over Big Slough 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 June 2023.
How much traffic does W66 over Big Slough Creek carry?
About 190 vehicles per day (2022 count), of which roughly 16% are trucks.
How long is W66 over Big Slough Creek?
The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 33 ft wide.
Who owns W66 over Big Slough Creek?
It is owned by the County Highway Agency.