US Bridges

State Route 166 over Salisbury Canyon

Fair

Santa Barbara County, California · 05-SB-166-64.76 · Structure no. 51 0065

Built
1943
82 years old, rebuilt 2008
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
4,500
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 166 over Salisbury Canyon is a concrete continuous culvert carrying State Route 166 over Salisbury 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 fair condition with a lowest component rating of 6 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 4,500 vehicles a day, roughly 23% of them trucks, projected to reach 2,628 by 2042. The structure is 26 ft (7.8 m) long and 54 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesState Route 166
CrossesSalisbury Canyon
Location05-SB-166-64.76
RouteState Highway 166
Coordinates34.94651, -119.68454
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length26 ft (7.8 m)
Longest span12 ft (3.7 m)
Deck width54 ft (16.5 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2009)
Projected traffic2,628 by 2042
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 166 over Salisbury 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 Salisbury Canyon 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 December 2024.

How much traffic does State Route 166 over Salisbury Canyon carry?

About 4,500 vehicles per day (2009 count), of which roughly 23% are trucks.

How long is State Route 166 over Salisbury Canyon?

The structure is 26 ft (7.8 m) long with a longest span of 12 ft (3.7 m) and a deck 54 ft wide.

Who owns State Route 166 over Salisbury Canyon?

It is owned by the State Highway Agency.