US Bridges

Masten Avenue over U.S. Highway 101

Good

Santa Clara County, California · 04-SCL-101-R10.27 · Structure no. 37 0330

Built
1972
53 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
233 ft
2 main spans
Daily traffic
2,200
1998 count
Owner
State
State Highway Agency

About this bridge

Masten Avenue over U.S. Highway 101 is a prestressed concrete continuous box beam or girders - multiple carrying Masten Avenue over U.S. Highway 101 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 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 2,200 vehicles a day, roughly 1% of them trucks, projected to reach 2,790 by 2046. The structure is 233 ft (71 m) long and 47 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

CarriesMasten Avenue
CrossesU.S. Highway 101
Location04-SCL-101-R10.27
RouteCounty Highway 0
Coordinates37.05919, -121.58491
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102.2 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length233 ft (71 m)
Longest span116 ft (35.3 m)
Deck width47 ft (14.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (1998)
Projected traffic2,790 by 2046
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

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 Masten Avenue over U.S. Highway 101 built?

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

What condition is Masten Avenue over U.S. Highway 101 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 Masten Avenue over U.S. Highway 101 carry?

About 2,200 vehicles per day (1998 count), of which roughly 1% are trucks.

How long is Masten Avenue over U.S. Highway 101?

The structure is 233 ft (71 m) long with a longest span of 116 ft (35.3 m) and a deck 47 ft wide.

Who owns Masten Avenue over U.S. Highway 101?

It is owned by the State Highway Agency.