US Bridges

State Route 280 over Los Gatos Creek

Good

Santa Clara County, California · 04-SCL-280-R3.19-SJS · Structure no. 37 0265R

Built
1969
56 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
184 ft
3 main spans
Daily traffic
98,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 280 over Los Gatos Creek is a concrete continuous box beam or girders - multiple carrying State Route 280 over Los Gatos Creek in Santa Clara County, California. It was built in 1969, so it is 56 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 98,000 vehicles a day, roughly 1% of them trucks, projected to reach 146,833 by 2041. The structure is 184 ft (56.1 m) long and 80 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesState Route 280
CrossesLos Gatos Creek
Location04-SCL-280-R3.19-SJS
RouteInterstate 280
Coordinates37.31915, -121.90234
Functional classUrban Principal Arterial - Interstate

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 protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.7 US tons
Inventory rating42.1 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span72 ft (21.9 m)
Deck width80 ft (24.4 m)
Roadway width78 ft (23.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic98,000 (2009)
Projected traffic146,833 by 2041
Trucks1%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 State Route 280 over Los Gatos Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is State Route 280 over Los Gatos 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 February 2023.

How much traffic does State Route 280 over Los Gatos Creek carry?

About 98,000 vehicles per day (2009 count), of which roughly 1% are trucks.

How long is State Route 280 over Los Gatos Creek?

The structure is 184 ft (56.1 m) long with a longest span of 72 ft (21.9 m) and a deck 80 ft wide.

Who owns State Route 280 over Los Gatos Creek?

It is owned by the State Highway Agency.