SR 122 over Tilton River
GoodLewis County, Washington · 3.6 E JCT US 12 · Structure no. 080050000000000
- Built
- 1961
- 64 years old
- Condition
- Good
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 1,114 ft
- 6 main spans
- Daily traffic
- 757
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SR 122 over Tilton River is a steel continuous stringer/multi-beam or girder carrying SR 122 over Tilton River in Lewis County, Washington. It was built in 1961, so it is 64 years old, older 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 757 vehicles a day, roughly 16% of them trucks, projected to reach 761 by 2039. The structure is 1,114 ft (339.5 m) long and 28 ft wide. If it were closed, the detour would be 13 mi (21 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 122 over Tilton River built?
It was built in 1961, making it 64 years old in 2025.
What condition is SR 122 over Tilton 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 April 2023.
How much traffic does SR 122 over Tilton River carry?
About 757 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is SR 122 over Tilton River?
The structure is 1,114 ft (339.5 m) long with a longest span of 160 ft (48.8 m) and a deck 28 ft wide.
Who owns SR 122 over Tilton River?
It is owned by the State Highway Agency.