US Bridges

State Route 152 over Miller Slough

Fair

Santa Clara County, California · 04-SCL-152-M9.62-GIL · Structure no. 37 0009

Built
1941
84 years old, rebuilt 1955
Condition
Fair
inspected October 2024
Type
Tee Beam
Concrete Continuous
Length
44 ft
2 main spans
Daily traffic
15,800
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 152 over Miller Slough is a concrete continuous tee beam carrying State Route 152 over Miller Slough in Santa Clara County, California. It was built in 1941 and reconstructed in 1955, so it is 84 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 15,800 vehicles a day, roughly 3% of them trucks, projected to reach 29,508 by 2046. The structure is 44 ft (13.4 m) long and 88 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesState Route 152
CrossesMiller Slough
Location04-SCL-152-M9.62-GIL
RouteState Highway 152
Coordinates37.01717, -121.57356
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span20 ft (6.1 m)
Deck width88 ft (26.7 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,800 (2009)
Projected traffic29,508 by 2046
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 152 over Miller Slough built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1955.

What condition is State Route 152 over Miller Slough 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 State Route 152 over Miller Slough carry?

About 15,800 vehicles per day (2009 count), of which roughly 3% are trucks.

How long is State Route 152 over Miller Slough?

The structure is 44 ft (13.4 m) long with a longest span of 20 ft (6.1 m) and a deck 88 ft wide.

Who owns State Route 152 over Miller Slough?

It is owned by the State Highway Agency.