County Road 1075 over Twisp River
GoodOkanogan County, Washington · 4.1 W.SR20 @ Twisp · Structure no. 081087000000000
- Built
- 1974
- 51 years old
- Condition
- Good
- inspected September 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 78 ft
- 1 main span
- Daily traffic
- 21
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
County Road 1075 over Twisp River is a prestressed concrete tee beam carrying County Road 1075 over Twisp River in Okanogan County, Washington. It was built in 1974, so it is 51 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 21 vehicles a day, roughly 16% of them trucks, projected to reach 40 by 2040. The structure is 78 ft (23.8 m) long and 16 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County Road 1075 over Twisp River built?
It was built in 1974, making it 51 years old in 2025.
What condition is County Road 1075 over Twisp 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 September 2023.
How much traffic does County Road 1075 over Twisp River carry?
About 21 vehicles per day (2021 count), of which roughly 16% are trucks.
How long is County Road 1075 over Twisp River?
The structure is 78 ft (23.8 m) long with a longest span of 77 ft (23.5 m) and a deck 16 ft wide.
Who owns County Road 1075 over Twisp River?
It is owned by the County Highway Agency.