US Bridges

Tierra Subida Ave over California Aqueduct

Fair

Los Angeles County, California · 0.5MI S/O Ave S · Structure no. 53C1499

Built
1968
57 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
136 ft
2 main spans
Daily traffic
1,996
2017 count
Owner
County
County Highway Agency

About this bridge

Tierra Subida Ave over California Aqueduct is a concrete continuous tee beam carrying Tierra Subida Ave 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 1,996 vehicles a day, roughly 2% of them trucks, projected to reach 2,196 by 2043. The structure is 136 ft (41.5 m) long and 39 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTierra Subida Ave
CrossesCalifornia Aqueduct
Location0.5MI S/O Ave S
RouteCounty Highway Q0207
CountyLos Angeles County
StateCalifornia
Coordinates34.55374, -118.14119
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 inspectionJune 2024
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 alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating43.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length136 ft (41.5 m)
Longest span65 ft (19.8 m)
Deck width39 ft (11.9 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,996 (2017)
Projected traffic2,196 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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 Tierra Subida Ave over California Aqueduct built?

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

What condition is Tierra Subida Ave 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 June 2024.

How much traffic does Tierra Subida Ave over California Aqueduct carry?

About 1,996 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Tierra Subida Ave over California Aqueduct?

The structure is 136 ft (41.5 m) long with a longest span of 65 ft (19.8 m) and a deck 39 ft wide.

Who owns Tierra Subida Ave over California Aqueduct?

It is owned by the County Highway Agency.