US Bridges

40th ST E over California Aqueduct

Fair

Los Angeles County, California · 0.8MI S/O SR-138 HWY · Structure no. 53C1501

Built
1968
57 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
116 ft
2 main spans
Daily traffic
7,645
2017 count
Owner
County
County Highway Agency

About this bridge

40th ST E over California Aqueduct is a concrete continuous tee beam carrying 40th ST E over California Aqueduct in Los Angeles County, California. It was built in 1968, so it is 57 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 7,645 vehicles a day, roughly 2% of them trucks, projected to reach 8,791 by 2041. The structure is 116 ft (35.4 m) long and 41 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries40th ST E
CrossesCalifornia Aqueduct
Location0.8MI S/O SR-138 HWY
RouteCounty Highway 0Q046
CountyLos Angeles County
StateCalifornia
Coordinates34.53226, -118.05836
Functional classUrban 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 protection9 ExcellentNo problems noted.
Last inspectionJuly 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.3 US tons
Inventory rating46.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length116 ft (35.4 m)
Longest span57 ft (17.4 m)
Deck width41 ft (12.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,645 (2017)
Projected traffic8,791 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 40th ST E over California Aqueduct built?

It was built in 1968, making it 57 years old in 2025.

What condition is 40th ST E 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 July 2023.

How much traffic does 40th ST E over California Aqueduct carry?

About 7,645 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is 40th ST E over California Aqueduct?

The structure is 116 ft (35.4 m) long with a longest span of 57 ft (17.4 m) and a deck 41 ft wide.

Who owns 40th ST E over California Aqueduct?

It is owned by the County Highway Agency.