US Bridges

U.S. Highway 101 over Quarantina Street

Good

Santa Barbara County, California · 05-SB-101-13.01-SB · Structure no. 51 0271

Built
1990
35 years old
Condition
Good
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
162 ft
3 main spans
Daily traffic
109,000
2009 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over Quarantina Street is a prestressed concrete continuous box beam or girders - multiple carrying U.S. Highway 101 over Quarantina Street in Santa Barbara County, California. It was built in 1990, so it is 35 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 109,000 vehicles a day, roughly 5% of them trucks, projected to reach 114,308 by 2042. The structure is 162 ft (49.4 m) long and 118 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesU.S. Highway 101
CrossesQuarantina Street
Location05-SB-101-13.01-SB
RouteU.S. Route 101
Coordinates34.42015, -119.68175
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 48 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length162 ft (49.4 m)
Longest span82 ft (25 m)
Deck width118 ft (36 m)
Roadway width113 ft (34.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic109,000 (2009)
Projected traffic114,308 by 2042
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
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 Quarantina Street built?

It was built in 1990, making it 35 years old in 2025.

What condition is U.S. Highway 101 over Quarantina Street 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 January 2024.

How much traffic does U.S. Highway 101 over Quarantina Street carry?

About 109,000 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is U.S. Highway 101 over Quarantina Street?

The structure is 162 ft (49.4 m) long with a longest span of 82 ft (25 m) and a deck 118 ft wide.

Who owns U.S. Highway 101 over Quarantina Street?

It is owned by the State Highway Agency.