US Bridges

Lubken Canyon Road over Los Angeles Aqueduct

Fair

Inyo County, California · 0.1 MI W of Route 395 · Structure no. 48C0024

Built
1991
34 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
58 ft
1 main span
Daily traffic
100
2019 count
Owner
County
County Highway Agency

About this bridge

Lubken Canyon Road over Los Angeles Aqueduct is a concrete stringer/multi-beam or girder carrying Lubken Canyon Road over Los Angeles Aqueduct in Inyo County, California. It was built in 1991, so it is 34 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 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 100 vehicles a day, roughly 1% of them trucks, projected to reach 104 by 2040. The structure is 58 ft (17.7 m) long and 31 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesLubken Canyon Road
CrossesLos Angeles Aqueduct
Location0.1 MI W of Route 395
RouteCity Street 0
Coordinates36.54241, -118.05034
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.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 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 alignment9: Superior to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span55 ft (16.8 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic104 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Lubken Canyon Road over Los Angeles Aqueduct built?

It was built in 1991, making it 34 years old in 2025.

What condition is Lubken Canyon Road over Los Angeles 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 September 2023.

How much traffic does Lubken Canyon Road over Los Angeles Aqueduct carry?

About 100 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is Lubken Canyon Road over Los Angeles Aqueduct?

The structure is 58 ft (17.7 m) long with a longest span of 55 ft (16.8 m) and a deck 31 ft wide.

Who owns Lubken Canyon Road over Los Angeles Aqueduct?

It is owned by the County Highway Agency.