US 12 over Mcnary Pool
GoodWalla Walla County, Washington · 4.4 E JCT SR 124 · Structure no. 0016449A0000000
- Built
- 2004
- 21 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 88 ft
- 1 main span
- Daily traffic
- 7,405
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Mcnary Pool is a prestressed concrete stringer/multi-beam or girder carrying US 12 over Mcnary Pool in Walla Walla County, Washington. It was built in 2004, so it is 21 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 7,405 vehicles a day, roughly 20% of them trucks, projected to reach 7,928 by 2039. The structure is 88 ft (26.8 m) long and 86 ft wide. If it were closed, the detour would be 80.2 mi (129 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 US 12 over Mcnary Pool built?
It was built in 2004, making it 21 years old in 2025.
What condition is US 12 over Mcnary Pool 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 May 2023.
How much traffic does US 12 over Mcnary Pool carry?
About 7,405 vehicles per day (2023 count), of which roughly 20% are trucks.
How long is US 12 over Mcnary Pool?
The structure is 88 ft (26.8 m) long with a longest span of 83 ft (25.3 m) and a deck 86 ft wide.
Who owns US 12 over Mcnary Pool?
It is owned by the State Highway Agency.