SR 161 over Mashel River
GoodPierce County, Washington · 2.5 N JCT SR 7 · Structure no. 0013070A0000000
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 164 ft
- 2 main spans
- Daily traffic
- 404
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 161 over Mashel River is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 161 over Mashel River in Pierce 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 404 vehicles a day, roughly 12% of them trucks, projected to reach 477 by 2039. The structure is 164 ft (50 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 161 over Mashel River built?
It was built in 1986, making it 39 years old in 2025.
What condition is SR 161 over Mashel 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 August 2023.
How much traffic does SR 161 over Mashel River carry?
About 404 vehicles per day (2023 count), of which roughly 12% are trucks.
How long is SR 161 over Mashel River?
The structure is 164 ft (50 m) long with a longest span of 99 ft (30.2 m) and a deck 36 ft wide.
Who owns SR 161 over Mashel River?
It is owned by the State Highway Agency.