State Route 166 over Cuyama River
GoodSan Luis Obispo County, California · 05-SLO-166-R51.02 · Structure no. 49 0043
- Built
- 1980
- 45 years old
- Condition
- Good
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 507 ft
- 4 main spans
- Daily traffic
- 2,900
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 166 over Cuyama River is a prestressed concrete continuous box beam or girders - multiple carrying State Route 166 over Cuyama River in San Luis Obispo County, California. It was built in 1980, so it is 45 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 2,900 vehicles a day, projected to reach 8,737 by 2042. The structure is 507 ft (154.6 m) long and 35 ft wide. If it were closed, the detour would be 123.7 mi (199 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 State Route 166 over Cuyama River built?
It was built in 1980, making it 45 years old in 2025.
What condition is State Route 166 over Cuyama 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 May 2024.
How much traffic does State Route 166 over Cuyama River carry?
About 2,900 vehicles per day (2009 count).
How long is State Route 166 over Cuyama River?
The structure is 507 ft (154.6 m) long with a longest span of 150 ft (45.7 m) and a deck 35 ft wide.
Who owns State Route 166 over Cuyama River?
It is owned by the State Highway Agency.