SR 106 over Twanoh Falls Creek
GoodMason County, Washington · 13.5 E JCT US 101 · Structure no. 0018494A0000000
- Built
- 2014
- 11 years old
- Condition
- Good
- inspected March 2024
- Type
- Culvert
- Concrete
- Length
- 27 ft
- 1 main span
- Daily traffic
- 2,353
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 106 over Twanoh Falls Creek is a concrete culvert carrying SR 106 over Twanoh Falls Creek in Mason County, Washington. It was built in 2014, so it is 11 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 2039. The structure is 27 ft (8.2 m) long and 64 ft wide. 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 Falls Creek built?
It was built in 2014, making it 11 years old in 2025.
What condition is SR 106 over Twanoh Falls 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 March 2024.
How much traffic does SR 106 over Twanoh Falls Creek carry?
About 2,353 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is SR 106 over Twanoh Falls Creek?
The structure is 27 ft (8.2 m) long with a longest span of 23 ft (7 m) and a deck 64 ft wide.
Who owns SR 106 over Twanoh Falls Creek?
It is owned by the State Highway Agency.