6th ST over Mill Creek
PoorPosted for loadWalla Walla County, Washington · 6th and Mill CR · Structure no. 085331000000000
- Built
- 1920
- 105 years old
- Condition
- Poor
- inspected September 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 65 ft
- 2 main spans
- Daily traffic
- 1,970
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
6th ST over Mill Creek is a concrete continuous tee beam carrying 6th ST over Mill Creek in Walla Walla County, Washington. It was built in 1920, so it is 105 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. Its operating status is: posted for load restriction.
It carries about 1,970 vehicles a day, roughly 10% of them trucks, projected to reach 4,375 by 2043. The structure is 65 ft (19.8 m) long and 79 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 6th ST over Mill Creek built?
It was built in 1920, making it 105 years old in 2025.
What condition is 6th ST over Mill Creek 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 September 2023.
How much traffic does 6th ST over Mill Creek carry?
About 1,970 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is 6th ST over Mill Creek?
The structure is 65 ft (19.8 m) long with a longest span of 30 ft (9.1 m) and a deck 79 ft wide.
Who owns 6th ST over Mill Creek?
It is owned by the City or Municipal Highway Agency.