US Bridges

Lokern Road over California Aqueduct

Fair

Kern County, California · 1.5 MI West of HWY 58 · Structure no. 50C0203

Built
1967
58 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete Continuous
Length
192 ft
3 main spans
Daily traffic
2,400
2011 count
Owner
State
Other State Agency

About this bridge

Lokern Road over California Aqueduct is a concrete continuous tee beam carrying Lokern Road over California Aqueduct in Kern County, California. It was built in 1967, so it is 58 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 2,400 vehicles a day, roughly 15% of them trucks, projected to reach 5,305 by 2041. The structure is 192 ft (58.4 m) long and 32 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesLokern Road
CrossesCalifornia Aqueduct
Location1.5 MI West of HWY 58
RouteCounty Highway 0
CountyKern County
StateCalifornia
Coordinates35.39854, -119.56233
Functional classRural Major 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length192 ft (58.4 m)
Longest span73 ft (22.3 m)
Deck width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2011)
Projected traffic5,305 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 Lokern Road over California Aqueduct built?

It was built in 1967, making it 58 years old in 2025.

What condition is Lokern 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 Lokern Road over California Aqueduct carry?

About 2,400 vehicles per day (2011 count), of which roughly 15% are trucks.

How long is Lokern Road over California Aqueduct?

The structure is 192 ft (58.4 m) long with a longest span of 73 ft (22.3 m) and a deck 32 ft wide.

Who owns Lokern Road over California Aqueduct?

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