So Skagit HWY over Mill Creek
FairSkagit County, Washington · 17.0 E JCT SR9 · Structure no. 083052000000000
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected July 2024
- Type
- Channel Beam
- Prestressed Concrete
- Length
- 41 ft
- 1 main span
- Daily traffic
- 635
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
So Skagit HWY over Mill Creek is a prestressed concrete channel beam carrying So Skagit HWY over Mill Creek in Skagit County, Washington. It was built in 1969, so it is 56 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.
It carries about 635 vehicles a day, roughly 12% of them trucks, projected to reach 944 by 2041. The structure is 41 ft (12.4 m) long and 30 ft wide. If it were closed, the detour would be 49.7 mi (80 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was So Skagit HWY over Mill Creek built?
It was built in 1969, making it 56 years old in 2025.
What condition is So Skagit HWY 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 July 2024.
How much traffic does So Skagit HWY over Mill Creek carry?
About 635 vehicles per day (2021 count), of which roughly 12% are trucks.
How long is So Skagit HWY over Mill Creek?
The structure is 41 ft (12.4 m) long with a longest span of 39 ft (12 m) and a deck 30 ft wide.
Who owns So Skagit HWY over Mill Creek?
It is owned by the County Highway Agency.