Rd. No. 20 over S Fork Sauk River
FairSnohomish County, Washington · MP 31.2 Rd. No. 20 · Structure no. 060502000001465
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 100 ft
- 1 main span
- Daily traffic
- 140
- 1992 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Rd. No. 20 over S Fork Sauk River is a prestressed concrete stringer/multi-beam or girder carrying Rd. No. 20 over S Fork Sauk River in Snohomish County, Washington. It was built in 1978, so it is 47 years old, younger 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 6 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 140 vehicles a day, roughly 10% of them trucks, projected to reach 210 by 2045. The structure is 100 ft (30.5 m) long and 31 ft wide. If it were closed, the detour would be 98.2 mi (158 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Rd. No. 20 over S Fork Sauk River built?
It was built in 1978, making it 47 years old in 2025.
What condition is Rd. No. 20 over S Fork Sauk River 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 October 2024.
How much traffic does Rd. No. 20 over S Fork Sauk River carry?
About 140 vehicles per day (1992 count), of which roughly 10% are trucks.
How long is Rd. No. 20 over S Fork Sauk River?
The structure is 100 ft (30.5 m) long with a longest span of 97 ft (29.6 m) and a deck 31 ft wide.
Who owns Rd. No. 20 over S Fork Sauk River?
It is owned by the U.S. Forest Service.