Mountain Loop HWY over Marten Creek
GoodSnohomish County, Washington · 20.6 E JCT SR 92 · Structure no. 088390000000000
- Built
- 2011
- 14 years old
- Condition
- Good
- inspected April 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 135 ft
- 1 main span
- Daily traffic
- 1,574
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Mountain Loop HWY over Marten Creek is a prestressed concrete tee beam carrying Mountain Loop HWY over Marten Creek in Snohomish County, Washington. It was built in 2011, so it is 14 years old, younger than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,574 vehicles a day, roughly 5% of them trucks, projected to reach 2,000 by 2045. The structure is 135 ft (41.1 m) long and 41 ft wide. If it were closed, the detour would be 93.8 mi (151 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Mountain Loop HWY over Marten Creek built?
It was built in 2011, making it 14 years old in 2025.
What condition is Mountain Loop HWY over Marten Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.
How much traffic does Mountain Loop HWY over Marten Creek carry?
About 1,574 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Mountain Loop HWY over Marten Creek?
The structure is 135 ft (41.1 m) long with a longest span of 130 ft (39.6 m) and a deck 41 ft wide.
Who owns Mountain Loop HWY over Marten Creek?
It is owned by the County Highway Agency.