US 101 over SR 108
GoodMason County, Washington · 3.5 S JCT SR 3 · Structure no. 0012707A0000000
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 109 ft
- 1 main span
- Daily traffic
- 11,184
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 101 over SR 108 is a prestressed concrete stringer/multi-beam or girder carrying US 101 over SR 108 in Mason County, Washington. It was built in 1986, so it is 39 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 11,184 vehicles a day, roughly 7% of them trucks, projected to reach 14,939 by 2039. The structure is 109 ft (33.2 m) long and 94 ft wide.
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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 101 over SR 108 built?
It was built in 1986, making it 39 years old in 2025.
What condition is US 101 over SR 108 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 July 2024.
How much traffic does US 101 over SR 108 carry?
About 11,184 vehicles per day (2023 count), of which roughly 7% are trucks.
How long is US 101 over SR 108?
The structure is 109 ft (33.2 m) long with a longest span of 109 ft (33.2 m) and a deck 94 ft wide.
Who owns US 101 over SR 108?
It is owned by the State Highway Agency.