US 12 over Nine Mile CR & RR
PoorWalla Walla County, Washington · 6.5 E JCT US 730 Spur · Structure no. 0001724B0000000
- Built
- 1933
- 92 years old, rebuilt 1988
- Condition
- Poor
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 213 ft
- 6 main spans
- Daily traffic
- 8,140
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 12 over Nine Mile CR & RR is a concrete stringer/multi-beam or girder carrying US 12 over Nine Mile CR & RR in Walla Walla County, Washington. It was built in 1933 and reconstructed in 1988, so it is 92 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 8,140 vehicles a day, roughly 16% of them trucks, projected to reach 8,981 by 2039. The structure is 213 ft (64.9 m) long and 35 ft wide. If it were closed, the detour would be 31.1 mi (50 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Nine Mile CR & RR built?
It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1988.
What condition is US 12 over Nine Mile CR & RR in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.
How much traffic does US 12 over Nine Mile CR & RR carry?
About 8,140 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is US 12 over Nine Mile CR & RR?
The structure is 213 ft (64.9 m) long with a longest span of 47 ft (14.3 m) and a deck 35 ft wide.
Who owns US 12 over Nine Mile CR & RR?
It is owned by the State Highway Agency.