US Bridges

263rd ST E over California Aqueduct

Fair

Los Angeles County, California · 1.0MI S/O SR-138 HWY · Structure no. 53C1513

Built
1968
57 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete
Length
95 ft
2 main spans
Daily traffic
236
2017 count
Owner
County
County Highway Agency

About this bridge

263rd ST E over California Aqueduct is a concrete tee beam carrying 263rd 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 236 vehicles a day, projected to reach 236 by 2041. The structure is 95 ft (29 m) long and 39 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
Carries263rd ST E
CrossesCalifornia Aqueduct
Location1.0MI S/O SR-138 HWY
RouteCounty Highway 0WP61
CountyLos Angeles County
StateCalifornia
Coordinates34.48661, -117.65993
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 protection9 ExcellentNo problems noted.
Last inspectionOctober 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 alignment7: Better than present minimum criteria
Operating rating65.4 US tons
Inventory rating38.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length95 ft (29 m)
Longest span47 ft (14.3 m)
Deck width39 ft (11.9 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic236 (2017)
Projected traffic236 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed11.8 mi (19 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 263rd ST E over California Aqueduct built?

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

What condition is 263rd 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 October 2023.

How much traffic does 263rd ST E over California Aqueduct carry?

About 236 vehicles per day (2017 count).

How long is 263rd ST E over California Aqueduct?

The structure is 95 ft (29 m) long with a longest span of 47 ft (14.3 m) and a deck 39 ft wide.

Who owns 263rd ST E over California Aqueduct?

It is owned by the County Highway Agency.