Auto Tour Route over Powell Slough
GoodColusa County, California · W .2 MI on Refuge Road · Structure no. 000011621-00055
- Built
- 1991
- 34 years old, rebuilt 2008
- Condition
- Good
- inspected October 2022
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 65 ft
- 1 main span
- Daily traffic
- 25
- 2022 count
- Owner
- Federal
- Bureau of Fish and Wildlife
About this bridge
Auto Tour Route over Powell Slough is a prestressed concrete box beam or girders - multiple carrying Auto Tour Route over Powell Slough in Colusa County, California. It was built in 1991 and reconstructed in 2008, so it is 34 years old, younger than the California average of 54.8 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 25 vehicles a day, projected to reach 30 by 2042. The structure is 65 ft (19.8 m) long and 32 ft wide. If it were closed, the detour would be 98.8 mi (159 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 Auto Tour Route over Powell Slough built?
It was built in 1991, making it 34 years old in 2025. It was reconstructed in 2008.
What condition is Auto Tour Route over Powell Slough 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 October 2022.
How much traffic does Auto Tour Route over Powell Slough carry?
About 25 vehicles per day (2022 count).
How long is Auto Tour Route over Powell Slough?
The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.5 m) and a deck 32 ft wide.
Who owns Auto Tour Route over Powell Slough?
It is owned by the Bureau of Fish and Wildlife.