US Bridges

Capitol EXPWY(G21) over Guadalupe Riv (capitol)

Good

Santa Clara County, California · Near Almaden RD · Structure no. 37C0044

Built
1966
59 years old
Condition
Good
inspected June 2023
Type
Tee Beam
Concrete Continuous
Length
129 ft
3 main spans
Daily traffic
56,050
2009 count
Owner
City
City or Municipal Highway Agency

About this bridge

Capitol EXPWY(G21) over Guadalupe Riv (capitol) is a concrete continuous tee beam carrying Capitol EXPWY(G21) over Guadalupe Riv (capitol) in Santa Clara County, California. It was built in 1966, so it is 59 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 56,050 vehicles a day, roughly 5% of them trucks, projected to reach 69,221 by 2043. The structure is 129 ft (39.3 m) long and 112 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesCapitol EXPWY(G21)
CrossesGuadalupe Riv (capitol)
LocationNear Almaden RD
RouteCounty Highway 0
Coordinates37.27552, -121.87702
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 protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37.8 US tons
Inventory rating29.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length129 ft (39.3 m)
Longest span42 ft (12.8 m)
Deck width112 ft (34.1 m)
Roadway width98 ft (29.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic56,050 (2009)
Projected traffic69,221 by 2043
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Capitol EXPWY(G21) over Guadalupe Riv (capitol) built?

It was built in 1966, making it 59 years old in 2025.

What condition is Capitol EXPWY(G21) over Guadalupe Riv (capitol) 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 June 2023.

How much traffic does Capitol EXPWY(G21) over Guadalupe Riv (capitol) carry?

About 56,050 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Capitol EXPWY(G21) over Guadalupe Riv (capitol)?

The structure is 129 ft (39.3 m) long with a longest span of 42 ft (12.8 m) and a deck 112 ft wide.

Who owns Capitol EXPWY(G21) over Guadalupe Riv (capitol)?

It is owned by the City or Municipal Highway Agency.