US Bridges

State Route 17 over Hillside

Fair

Santa Clara County, California · 04-SCL-017-5.43 · Structure no. 37 0029

Built
1940
85 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
927 ft
37 main spans
Daily traffic
78,000
2017 count
Owner
State
State Highway Agency

About this bridge

State Route 17 over Hillside is a steel stringer/multi-beam or girder carrying State Route 17 over Hillside in Santa Clara County, California. It was built in 1940, so it is 85 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 78,000 vehicles a day, roughly 6% of them trucks, projected to reach 95,238 by 2044. The structure is 927 ft (282.5 m) long and 25 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesState Route 17
CrossesHillside
Location04-SCL-017-5.43
RouteState Highway 17
CountySanta Clara County
StateCalifornia
Coordinates37.20918, -121.98958
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans37
Design loadHS 20
Structure length927 ft (282.5 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.6 m)
Roadway width55 ft (16.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic78,000 (2017)
Projected traffic95,238 by 2044
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed18 mi (29 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 17 over Hillside built?

It was built in 1940, making it 85 years old in 2025.

What condition is State Route 17 over Hillside 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 July 2024.

How much traffic does State Route 17 over Hillside carry?

About 78,000 vehicles per day (2017 count), of which roughly 6% are trucks.

How long is State Route 17 over Hillside?

The structure is 927 ft (282.5 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns State Route 17 over Hillside?

It is owned by the State Highway Agency.