US Bridges

U.S. Highway 101 over San Antonio Creek

Good

Santa Barbara County, California · 05-SB-101-67.41 · Structure no. 51 0008

Built
1916
109 years old, rebuilt 1954
Condition
Good
inspected May 2023
Type
Girder and Floorbeam System
Concrete
Length
29 ft
1 main span
Daily traffic
29,000
2009 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 101 over San Antonio Creek is a concrete girder and floorbeam system carrying U.S. Highway 101 over San Antonio Creek in Santa Barbara County, California. It was built in 1916 and reconstructed in 1954, so it is 109 years old, older 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 29,000 vehicles a day, roughly 13% of them trucks, projected to reach 58,406 by 2042. The structure is 29 ft (8.8 m) long and 72 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesU.S. Highway 101
CrossesSan Antonio Creek
Location05-SB-101-67.41
RouteU.S. Route 101
Coordinates34.724, -120.21413
Functional classRural Principal Arterial - Other

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating55.7 US tons
Inventory rating33.6 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width72 ft (21.9 m)
Roadway width72 ft (21.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,000 (2009)
Projected traffic58,406 by 2042
Trucks13%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S. Highway 101 over San Antonio Creek built?

It was built in 1916, making it 109 years old in 2025. It was reconstructed in 1954.

What condition is U.S. Highway 101 over San Antonio Creek 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 May 2023.

How much traffic does U.S. Highway 101 over San Antonio Creek carry?

About 29,000 vehicles per day (2009 count), of which roughly 13% are trucks.

How long is U.S. Highway 101 over San Antonio Creek?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 72 ft wide.

Who owns U.S. Highway 101 over San Antonio Creek?

It is owned by the State Highway Agency.