US Bridges

Lupin RD over South Bay Aqueduct

Fair

Alameda County, California · 1.0 MI E Greenville RD · Structure no. 33C0243

Built
1962
63 years old
Condition
Fair
inspected November 2023
Type
Tee Beam
Concrete
Length
40 ft
1 main span
Daily traffic
30
2011 count
Owner
County
County Highway Agency

About this bridge

Lupin RD over South Bay Aqueduct is a concrete tee beam carrying Lupin RD over South Bay Aqueduct in Alameda County, California. It was built in 1962, so it is 63 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 30 vehicles a day, projected to reach 57 by 2043. The structure is 40 ft (12.2 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesLupin RD
CrossesSouth Bay Aqueduct
Location1.0 MI E Greenville RD
RouteCounty Highway 0
CountyAlameda County
StateCalifornia
Coordinates37.68698, -121.67942
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating30.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2011)
Projected traffic57 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Lupin RD over South Bay Aqueduct built?

It was built in 1962, making it 63 years old in 2025.

What condition is Lupin RD over South Bay Aqueduct 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 Lupin RD over South Bay Aqueduct carry?

About 30 vehicles per day (2011 count).

How long is Lupin RD over South Bay Aqueduct?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 31 ft wide.

Who owns Lupin RD over South Bay Aqueduct?

It is owned by the County Highway Agency.