Patterson 3220 over Kamiache Creek
GoodWhitman County, Washington · 1.87 MI NW Stephens RD · Structure no. 087512000000000
- Built
- 2006
- 19 years old
- Condition
- Good
- inspected October 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 25 ft
- 1 main span
- Daily traffic
- 81
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Patterson 3220 over Kamiache Creek is a prestressed concrete slab carrying Patterson 3220 over Kamiache Creek in Whitman County, Washington. It was built in 2006, so it is 19 years old, younger than the Washington average of 49.8 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 81 vehicles a day, roughly 25% of them trucks, projected to reach 83 by 2039. The structure is 25 ft (7.6 m) long and 28 ft wide. If it were closed, the detour would be 18 mi (29 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 | 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 Patterson 3220 over Kamiache Creek built?
It was built in 2006, making it 19 years old in 2025.
What condition is Patterson 3220 over Kamiache 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 October 2024.
How much traffic does Patterson 3220 over Kamiache Creek carry?
About 81 vehicles per day (2020 count), of which roughly 25% are trucks.
How long is Patterson 3220 over Kamiache Creek?
The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 28 ft wide.
Who owns Patterson 3220 over Kamiache Creek?
It is owned by the County Highway Agency.