US Bridges

San Tomas Expwy over UP RR & Caltrain

Fair

Santa Clara County, California · 0.2 MI North of Monroe ST · Structure no. 37C0197

Built
1967
58 years old, rebuilt 1981
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
208 ft
3 main spans
Daily traffic
65,780
2014 count
Owner
County
County Highway Agency

About this bridge

San Tomas Expwy over UP RR & Caltrain is a steel stringer/multi-beam or girder carrying San Tomas Expwy over UP RR & Caltrain in Santa Clara County, California. It was built in 1967 and reconstructed in 1981, so it is 58 years old, older 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 6 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 65,780 vehicles a day, roughly 5% of them trucks, projected to reach 72,610 by 2042. The structure is 208 ft (63.4 m) long and 106 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSan Tomas Expwy
CrossesUP RR & Caltrain
Location0.2 MI North of Monroe ST
RouteCounty Highway 0
CountySanta Clara County
StateCalifornia
Coordinates37.36606, -121.96527
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.2 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length208 ft (63.4 m)
Longest span84 ft (25.6 m)
Deck width106 ft (32.2 m)
Roadway width96 ft (29.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65,780 (2014)
Projected traffic72,610 by 2042
Trucks5%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 San Tomas Expwy over UP RR & Caltrain built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1981.

What condition is San Tomas Expwy over UP RR & Caltrain 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 October 2024.

How much traffic does San Tomas Expwy over UP RR & Caltrain carry?

About 65,780 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is San Tomas Expwy over UP RR & Caltrain?

The structure is 208 ft (63.4 m) long with a longest span of 84 ft (25.6 m) and a deck 106 ft wide.

Who owns San Tomas Expwy over UP RR & Caltrain?

It is owned by the County Highway Agency.