US Bridges

Lewis ST over Miller Slough

Fair

Santa Clara County, California · Near Forrest ST · Structure no. 37C0320

Built
1999
26 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
63 ft
2 main spans
Daily traffic
2,231
2012 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lewis ST over Miller Slough is a concrete continuous slab carrying Lewis ST over Miller Slough in Santa Clara County, California. It was built in 1999, so it is 26 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 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 2,231 vehicles a day, roughly 3% of them trucks, projected to reach 2,559 by 2046. The structure is 63 ft (19.1 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesLewis ST
CrossesMiller Slough
LocationNear Forrest ST
RouteCity Street 0
CountySanta Clara County
StateCalifornia
Coordinates37.01082, -121.56559
Functional classUrban Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating29.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length63 ft (19.1 m)
Longest span30 ft (9.1 m)
Deck width50 ft (15.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,231 (2012)
Projected traffic2,559 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Lewis ST over Miller Slough built?

It was built in 1999, making it 26 years old in 2025.

What condition is Lewis ST 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 December 2024.

How much traffic does Lewis ST over Miller Slough carry?

About 2,231 vehicles per day (2012 count), of which roughly 3% are trucks.

How long is Lewis ST over Miller Slough?

The structure is 63 ft (19.1 m) long with a longest span of 30 ft (9.1 m) and a deck 50 ft wide.

Who owns Lewis ST over Miller Slough?

It is owned by the City or Municipal Highway Agency.