US Bridges

Tupman Road over California Aqueduct

Fair

Kern County, California · 2 MI S of Station Road · Structure no. 50C0200

Built
1965
60 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
223 ft
3 main spans
Daily traffic
690
2011 count
Owner
State
Other State Agency

About this bridge

Tupman Road over California Aqueduct is a concrete continuous tee beam carrying Tupman Road over California Aqueduct in Kern County, California. It was built in 1965, so it is 60 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 690 vehicles a day, roughly 15% of them trucks, projected to reach 1,609 by 2041. The structure is 223 ft (68 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesTupman Road
CrossesCalifornia Aqueduct
Location2 MI S of Station Road
RouteCounty Highway 0
CountyKern County
StateCalifornia
Coordinates35.30581, -119.36916
Functional classRural Minor Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length223 ft (68 m)
Longest span85 ft (25.9 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic690 (2011)
Projected traffic1,609 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State 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 Tupman Road over California Aqueduct built?

It was built in 1965, making it 60 years old in 2025.

What condition is Tupman Road over California 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 March 2023.

How much traffic does Tupman Road over California Aqueduct carry?

About 690 vehicles per day (2011 count), of which roughly 15% are trucks.

How long is Tupman Road over California Aqueduct?

The structure is 223 ft (68 m) long with a longest span of 85 ft (25.9 m) and a deck 33 ft wide.

Who owns Tupman Road over California Aqueduct?

It is owned by the Other State Agency and maintained by the County Highway Agency.