US Bridges

Lancaster RD over California Aqueduct

Fair

Los Angeles County, California · 1MI S/O Ave D · Structure no. 53C0811

Built
1967
58 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete Continuous
Length
140 ft
2 main spans
Daily traffic
408
2014 count
Owner
County
County Highway Agency

About this bridge

Lancaster RD over California Aqueduct is a concrete continuous tee beam carrying Lancaster RD over California Aqueduct in Los Angeles 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 6 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 408 vehicles a day, roughly 2% of them trucks, projected to reach 408 by 2044. The structure is 140 ft (42.7 m) long and 39 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

CarriesLancaster RD
CrossesCalifornia Aqueduct
Location1MI S/O Ave D
RouteCounty Highway 0Q006
Coordinates34.76099, -118.54433
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating43.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span71 ft (21.6 m)
Deck width39 ft (11.9 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic408 (2014)
Projected traffic408 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed34.8 mi (56 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 Lancaster RD over California Aqueduct built?

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

What condition is Lancaster RD 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 May 2024.

How much traffic does Lancaster RD over California Aqueduct carry?

About 408 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Lancaster RD over California Aqueduct?

The structure is 140 ft (42.7 m) long with a longest span of 71 ft (21.6 m) and a deck 39 ft wide.

Who owns Lancaster RD over California Aqueduct?

It is owned by the County Highway Agency.