US Bridges

U.S. Highway 101 over State Route 166

Fair

Santa Barbara County, California · 05-SB-101-88.60-SMRA · Structure no. 51 0201

Built
1962
63 years old, rebuilt 2008
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete Continuous
Length
145 ft
3 main spans
Daily traffic
58,000
2009 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over State Route 166 is a concrete continuous tee beam carrying U.S. Highway 101 over State Route 166 in Santa Barbara County, California. It was built in 1962 and reconstructed in 2008, so it is 63 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 5 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 58,000 vehicles a day, roughly 7% of them trucks, projected to reach 105,522 by 2042. The structure is 145 ft (44.2 m) long and 113 ft wide.

CarriesU.S. Highway 101
CrossesState Route 166
Location05-SB-101-88.60-SMRA
RouteU.S. Route 101
Coordinates34.95279, -120.4171
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span75 ft (22.9 m)
Deck width113 ft (34.3 m)
Roadway width108 ft (33 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,000 (2009)
Projected traffic105,522 by 2042
Trucks7%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was U.S. Highway 101 over State Route 166 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2008.

What condition is U.S. Highway 101 over State Route 166 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 U.S. Highway 101 over State Route 166 carry?

About 58,000 vehicles per day (2009 count), of which roughly 7% are trucks.

How long is U.S. Highway 101 over State Route 166?

The structure is 145 ft (44.2 m) long with a longest span of 75 ft (22.9 m) and a deck 113 ft wide.

Who owns U.S. Highway 101 over State Route 166?

It is owned by the State Highway Agency.