Main ST over Mill Creek
FairPosted for loadWalla Walla County, Washington · Main and Mill CR · Structure no. 085354000000000
- Built
- 1902
- 123 years old, rebuilt 1950
- Condition
- Fair
- inspected September 2023
- Type
- Tee Beam
- Concrete
- Length
- 52 ft
- 1 main span
- Daily traffic
- 4,412
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Main ST over Mill Creek is a concrete tee beam carrying Main ST over Mill Creek in Walla Walla County, Washington. It was built in 1902 and reconstructed in 1950, so it is 123 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 4,412 vehicles a day, roughly 5% of them trucks, projected to reach 57,400 by 2043. The structure is 52 ft (15.8 m) long and 101 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 Main ST over Mill Creek built?
It was built in 1902, making it 123 years old in 2025. It was reconstructed in 1950.
What condition is Main ST over Mill Creek in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.
How much traffic does Main ST over Mill Creek carry?
About 4,412 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Main ST over Mill Creek?
The structure is 52 ft (15.8 m) long with a longest span of 50 ft (15.2 m) and a deck 101 ft wide.
Who owns Main ST over Mill Creek?
It is owned by the City or Municipal Highway Agency.