State Route 166 over Branch Canyon
PoorSanta Barbara County, California · 05-SB-166-64.19 · Structure no. 51 0036
- Built
- 1943
- 82 years old, rebuilt 2008
- Condition
- Poor
- inspected December 2024
- Type
- Slab
- Concrete Continuous
- Length
- 56 ft
- 3 main spans
- Daily traffic
- 4,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 166 over Branch Canyon is a concrete continuous slab carrying State Route 166 over Branch Canyon in Santa Barbara County, California. It was built in 1943 and reconstructed in 2008, so it is 82 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 4,500 vehicles a day, roughly 23% of them trucks, projected to reach 2,628 by 2046. The structure is 56 ft (17.1 m) long and 42 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 166 over Branch Canyon built?
It was built in 1943, making it 82 years old in 2025. It was reconstructed in 2008.
What condition is State Route 166 over Branch Canyon in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.
How much traffic does State Route 166 over Branch Canyon carry?
About 4,500 vehicles per day (2009 count), of which roughly 23% are trucks.
How long is State Route 166 over Branch Canyon?
The structure is 56 ft (17.1 m) long with a longest span of 19 ft (5.8 m) and a deck 42 ft wide.
Who owns State Route 166 over Branch Canyon?
It is owned by the State Highway Agency.