US Bridges

Montague Expwy over Interstate 880

Good

Santa Clara County, California · 04-SCL-880-6.69-SJS · Structure no. 37 0375

Built
1974
51 years old, rebuilt 1988
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
370 ft
2 main spans
Daily traffic
85,400
2019 count
Owner
State
State Highway Agency

About this bridge

Montague Expwy over Interstate 880 is a prestressed concrete continuous box beam or girders - multiple carrying Montague Expwy over Interstate 880 in Santa Clara County, California. It was built in 1974 and reconstructed in 1988, 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 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 85,400 vehicles a day, roughly 2% of them trucks, projected to reach 210,237 by 2043. The structure is 370 ft (112.8 m) long and 134 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMontague Expwy
CrossesInterstate 880
Location04-SCL-880-6.69-SJS
RouteCity Street 0
Coordinates37.40096, -121.90936
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.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating48.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length370 ft (112.8 m)
Longest span185 ft (56.4 m)
Deck width134 ft (40.8 m)
Roadway width120 ft (36.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85,400 (2019)
Projected traffic210,237 by 2043
Trucks2%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Montague Expwy over Interstate 880 built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 1988.

What condition is Montague Expwy over Interstate 880 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 March 2023.

How much traffic does Montague Expwy over Interstate 880 carry?

About 85,400 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Montague Expwy over Interstate 880?

The structure is 370 ft (112.8 m) long with a longest span of 185 ft (56.4 m) and a deck 134 ft wide.

Who owns Montague Expwy over Interstate 880?

It is owned by the State Highway Agency.