US Bridges

State Route 87 SB over Capitol Expressway

Fair

Santa Clara County, California · 04-SCL-087-1.34-SJS · Structure no. 37 0415L

Built
1993
32 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
257 ft
2 main spans
Daily traffic
51,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 87 SB over Capitol Expressway is a prestressed concrete continuous box beam or girders - multiple carrying State Route 87 SB over Capitol Expressway in Santa Clara County, California. It was built in 1993, so it is 32 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 51,000 vehicles a day, projected to reach 75,330 by 2045. The structure is 257 ft (78.3 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesState Route 87 SB
CrossesCapitol Expressway
Location04-SCL-087-1.34-SJS
RouteState Highway 87
CountySanta Clara County
StateCalifornia
Coordinates37.27425, -121.86316
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating48.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length257 ft (78.3 m)
Longest span136 ft (41.4 m)
Deck width57 ft (17.3 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,000 (2009)
Projected traffic75,330 by 2045
Trucks0%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 State Route 87 SB over Capitol Expressway built?

It was built in 1993, making it 32 years old in 2025.

What condition is State Route 87 SB over Capitol Expressway 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 April 2023.

How much traffic does State Route 87 SB over Capitol Expressway carry?

About 51,000 vehicles per day (2009 count).

How long is State Route 87 SB over Capitol Expressway?

The structure is 257 ft (78.3 m) long with a longest span of 136 ft (41.4 m) and a deck 57 ft wide.

Who owns State Route 87 SB over Capitol Expressway?

It is owned by the State Highway Agency.