SR 106 over Twanoh Creek
GoodMason County, Washington · 12.3 E JCT US 101 · Structure no. 0019867A0000000
- Built
- 2023
- 2 years old
- Condition
- Good
- inspected October 2023
- Type
- Culvert
- Concrete
- Length
- 29 ft
- 1 main span
- Daily traffic
- 2,353
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 106 over Twanoh Creek is a concrete culvert carrying SR 106 over Twanoh Creek in Mason County, Washington. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,353 vehicles a day, roughly 5% of them trucks, projected to reach 3,221 by 2042. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 19.3 mi (31 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 106 over Twanoh Creek built?
It was built in 2023, making it 2 years old in 2025.
What condition is SR 106 over Twanoh 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 October 2023.
How much traffic does SR 106 over Twanoh Creek carry?
About 2,353 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is SR 106 over Twanoh Creek?
The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m).
Who owns SR 106 over Twanoh Creek?
It is owned by the State Highway Agency.