4th ST over Mill Creek
PoorPosted for loadWalla Walla County, Washington · 4th and Mill CR · Structure no. 085349000000000
- Built
- 1908
- 117 years old
- Condition
- Poor
- inspected September 2023
- Type
- Tee Beam
- Concrete
- Length
- 51 ft
- 1 main span
- Daily traffic
- 2,624
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
4th ST over Mill Creek is a concrete tee beam carrying 4th ST over Mill Creek in Walla Walla County, Washington. It was built in 1908, so it is 117 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 2,624 vehicles a day, roughly 10% of them trucks, projected to reach 8,420 by 2043. The structure is 51 ft (15.5 m) long and 78 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 4th ST over Mill Creek built?
It was built in 1908, making it 117 years old in 2025.
What condition is 4th 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 4th ST over Mill Creek carry?
About 2,624 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is 4th ST over Mill Creek?
The structure is 51 ft (15.5 m) long with a longest span of 49 ft (14.9 m) and a deck 78 ft wide.
Who owns 4th ST over Mill Creek?
It is owned by the City or Municipal Highway Agency.