Twin Oaks Road over Overflow Channel
FairLewis County, Washington · 1.37 from 92008 · Structure no. 087128000000000
- Built
- 1950
- 75 years old
- Condition
- Fair
- inspected February 2023
- Type
- Slab
- Concrete Continuous
- Length
- 34 ft
- 3 main spans
- Daily traffic
- 867
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
Twin Oaks Road over Overflow Channel is a concrete continuous slab carrying Twin Oaks Road over Overflow Channel in Lewis County, Washington. It was built in 1950, so it is 75 years old, older than the Washington average of 49.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 867 vehicles a day, roughly 20% of them trucks, projected to reach 1,566 by 2042. The structure is 34 ft (10.4 m) long and 27 ft wide. If it were closed, the detour would be 6.8 mi (11 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Twin Oaks Road over Overflow Channel built?
It was built in 1950, making it 75 years old in 2025.
What condition is Twin Oaks Road over Overflow Channel in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2023.
How much traffic does Twin Oaks Road over Overflow Channel carry?
About 867 vehicles per day (2022 count), of which roughly 20% are trucks.
How long is Twin Oaks Road over Overflow Channel?
The structure is 34 ft (10.4 m) long with a longest span of 11 ft (3.4 m) and a deck 27 ft wide.
Who owns Twin Oaks Road over Overflow Channel?
It is owned by the County Highway Agency.