US Bridges

N&S101- N280&N680 over I 280 I 680 US 101 Story

Fair

Santa Clara County, California · 04-SCL-101-34.87-SJS · Structure no. 37 0352H

Built
1974
51 years old, rebuilt 1982
Condition
Fair
inspected January 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
8,646 ft
58 main spans
Daily traffic
40,000
1998 count
Owner
State
State Highway Agency

About this bridge

N&S101- N280&N680 over I 280 I 680 US 101 Story is a concrete continuous box beam or girders - multiple carrying N&S101- N280&N680 over I 280 I 680 US 101 Story in Santa Clara County, California. It was built in 1974 and reconstructed in 1982, so it is 51 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 40,000 vehicles a day, roughly 6% of them trucks, projected to reach 54,518 by 2041. The structure is 8,646 ft (2,635.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN&S101- N280&N680
CrossesI 280 I 680 US 101 Story
Location04-SCL-101-34.87-SJS
RouteU.S. Route 101
CountySanta Clara County
StateCalifornia
Coordinates37.33806, -121.8491
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2023
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 geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating92.8 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans58 (+7 approach)
Design loadHS 20 + Mod
Structure length8,646 ft (2,635.3 m)
Longest span157 ft (47.9 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deck18 ft (5.4 m)

Traffic and service

Average daily traffic40,000 (1998)
Projected traffic54,518 by 2041
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 N&S101- N280&N680 over I 280 I 680 US 101 Story built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 1982.

What condition is N&S101- N280&N680 over I 280 I 680 US 101 Story 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 2023.

How much traffic does N&S101- N280&N680 over I 280 I 680 US 101 Story carry?

About 40,000 vehicles per day (1998 count), of which roughly 6% are trucks.

How long is N&S101- N280&N680 over I 280 I 680 US 101 Story?

The structure is 8,646 ft (2,635.3 m) long with a longest span of 157 ft (47.9 m) and a deck 44 ft wide.

Who owns N&S101- N280&N680 over I 280 I 680 US 101 Story?

It is owned by the State Highway Agency.