US Bridges

Foothill Road over Sinbad Creek

Fair

Alameda County, California · At Kilkare RD · Structure no. 33C0145

Built
1948
77 years old
Condition
Fair
inspected November 2023
Type
Frame
Concrete
Length
28 ft
1 main span
Daily traffic
1,000
2014 count
Owner
County
County Highway Agency

About this bridge

Foothill Road over Sinbad Creek is a concrete frame carrying Foothill Road over Sinbad Creek in Alameda County, California. It was built in 1948, so it is 77 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 5 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 1,000 vehicles a day, roughly 2% of them trucks, projected to reach 817 by 2041. The structure is 28 ft (8.5 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesFoothill Road
CrossesSinbad Creek
LocationAt Kilkare RD
RouteCounty Highway 0
CountyAlameda County
StateCalifornia
Coordinates37.59447, -121.88845
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span23 ft (7 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2014)
Projected traffic817 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Foothill Road over Sinbad Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is Foothill Road over Sinbad Creek 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 November 2023.

How much traffic does Foothill Road over Sinbad Creek carry?

About 1,000 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Foothill Road over Sinbad Creek?

The structure is 28 ft (8.5 m) long with a longest span of 23 ft (7 m) and a deck 30 ft wide.

Who owns Foothill Road over Sinbad Creek?

It is owned by the County Highway Agency.