US Bridges

Alvarado ST Sep over Route 101

Fair

Los Angeles County, California · 07-LA-101-2.86-LA · Structure no. 53 0617

Built
1948
77 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
113 ft
1 main span
Daily traffic
265,000
2020 count
Owner
State
State Highway Agency

About this bridge

Alvarado ST Sep over Route 101 is a concrete box beam or girders - multiple carrying Alvarado ST Sep over Route 101 in Los Angeles County, California. It was built in 1948, so it is 77 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 265,000 vehicles a day, roughly 10% of them trucks, projected to reach 335,444 by 2042. The structure is 113 ft (34.4 m) long and 184 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesAlvarado ST Sep
CrossesRoute 101
Location07-LA-101-2.86-LA
RouteU.S. Route 101
CountyLos Angeles County
StateCalifornia
Coordinates34.07208, -118.26669
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.8 US tons
Inventory rating63.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length113 ft (34.4 m)
Longest span100 ft (30.5 m)
Deck width184 ft (56.1 m)
Roadway width136 ft (41.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic265,000 (2020)
Projected traffic335,444 by 2042
Trucks10%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Alvarado ST Sep over Route 101 built?

It was built in 1948, making it 77 years old in 2025.

What condition is Alvarado ST Sep over Route 101 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 January 2024.

How much traffic does Alvarado ST Sep over Route 101 carry?

About 265,000 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Alvarado ST Sep over Route 101?

The structure is 113 ft (34.4 m) long with a longest span of 100 ft (30.5 m) and a deck 184 ft wide.

Who owns Alvarado ST Sep over Route 101?

It is owned by the State Highway Agency.