US Bridges

NB U.S. HWY 101 over UP AMTRAK & Private RD

Good

Santa Clara County, California · 04-SCL-101-R0.81 · Structure no. 37 0006R

Built
1950
75 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
607 ft
11 main spans
Daily traffic
26,000
2009 count
Owner
State
State Highway Agency

About this bridge

NB U.S. HWY 101 over UP AMTRAK & Private RD is a steel stringer/multi-beam or girder carrying NB U.S. HWY 101 over UP AMTRAK & Private RD in Santa Clara County, California. It was built in 1950, so it is 75 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 26,000 vehicles a day, roughly 8% of them trucks, projected to reach 65,436 by 2042. The structure is 607 ft (185 m) long and 34 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

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CarriesNB U.S. HWY 101
CrossesUP AMTRAK & Private RD
Location04-SCL-101-R0.81
RouteU.S. Route 101
CountySanta Clara County
StateCalifornia
Coordinates36.9289, -121.54731
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length607 ft (185 m)
Longest span72 ft (21.9 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,000 (2009)
Projected traffic65,436 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed19.3 mi (31 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 NB U.S. HWY 101 over UP AMTRAK & Private RD built?

It was built in 1950, making it 75 years old in 2025.

What condition is NB U.S. HWY 101 over UP AMTRAK & Private RD 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 October 2024.

How much traffic does NB U.S. HWY 101 over UP AMTRAK & Private RD carry?

About 26,000 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is NB U.S. HWY 101 over UP AMTRAK & Private RD?

The structure is 607 ft (185 m) long with a longest span of 72 ft (21.9 m) and a deck 34 ft wide.

Who owns NB U.S. HWY 101 over UP AMTRAK & Private RD?

It is owned by the State Highway Agency.