US Bridges

US Highway 101 over Little Llagas Creek

Fair

Santa Clara County, California · 04-SCL-101-R13.87 · Structure no. 37 0392

Built
1972
53 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
35 ft
2 main spans
Daily traffic
112,000
2009 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 over Little Llagas Creek is a concrete continuous culvert carrying US Highway 101 over Little Llagas Creek in Santa Clara County, California. It was built in 1972, so it is 53 years old, younger 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 112,000 vehicles a day, roughly 13% of them trucks, projected to reach 174,171 by 2046. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS Highway 101
CrossesLittle Llagas Creek
Location04-SCL-101-R13.87
RouteU.S. Route 101
Coordinates37.10574, -121.61258
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic112,000 (2009)
Projected traffic174,171 by 2046
Trucks13%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 US Highway 101 over Little Llagas Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is US Highway 101 over Little Llagas Creek 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 September 2024.

How much traffic does US Highway 101 over Little Llagas Creek carry?

About 112,000 vehicles per day (2009 count), of which roughly 13% are trucks.

How long is US Highway 101 over Little Llagas Creek?

The structure is 35 ft (10.7 m) long with a longest span of 12 ft (3.7 m).

Who owns US Highway 101 over Little Llagas Creek?

It is owned by the State Highway Agency.