Mountain Loop HWY over Sauk River
GoodSnohomish County, Washington · 9.0 SE Darrington · Structure no. 086521000000000
- Built
- 1983
- 42 years old
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 169 ft
- 1 main span
- Daily traffic
- 650
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Mountain Loop HWY over Sauk River is a prestressed concrete stringer/multi-beam or girder carrying Mountain Loop HWY over Sauk River in Snohomish County, Washington. It was built in 1983, so it is 42 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 650 vehicles a day, roughly 10% of them trucks, projected to reach 800 by 2040. The structure is 169 ft (51.5 m) long and 37 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mountain Loop HWY over Sauk River built?
It was built in 1983, making it 42 years old in 2025.
What condition is Mountain Loop HWY over Sauk River 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 May 2024.
How much traffic does Mountain Loop HWY over Sauk River carry?
About 650 vehicles per day (2021 count), of which roughly 10% are trucks.
How long is Mountain Loop HWY over Sauk River?
The structure is 169 ft (51.5 m) long with a longest span of 125 ft (38.1 m) and a deck 37 ft wide.
Who owns Mountain Loop HWY over Sauk River?
It is owned by the County Highway Agency.