US Bridges

US Highway 101 SB over Castillo Street

Fair

Santa Barbara County, California · 05-SB-101-R14.19-SB · Structure no. 51 0204L

Built
1963
62 years old, rebuilt 1989
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
139 ft
1 main span
Daily traffic
54,500
2009 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 SB over Castillo Street is a concrete box beam or girders - multiple carrying US Highway 101 SB over Castillo Street in Santa Barbara County, California. It was built in 1963 and reconstructed in 1989, so it is 62 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 54,500 vehicles a day, roughly 5% of them trucks, projected to reach 59,087 by 2044. The structure is 139 ft (42.3 m) long and 55 ft wide.

CarriesUS Highway 101 SB
CrossesCastillo Street
Location05-SB-101-R14.19-SB
RouteU.S. Route 101
Coordinates34.41221, -119.69891
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length139 ft (42.3 m)
Longest span74 ft (22.6 m)
Deck width55 ft (16.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54,500 (2009)
Projected traffic59,087 by 2044
Trucks5%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
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 US Highway 101 SB over Castillo Street built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1989.

What condition is US Highway 101 SB over Castillo Street 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 January 2024.

How much traffic does US Highway 101 SB over Castillo Street carry?

About 54,500 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is US Highway 101 SB over Castillo Street?

The structure is 139 ft (42.3 m) long with a longest span of 74 ft (22.6 m) and a deck 55 ft wide.

Who owns US Highway 101 SB over Castillo Street?

It is owned by the State Highway Agency.