US Bridges

Bonnie Brae ST over Route 101

Fair

Los Angeles County, California · 07-LA-101-2.71-LA · Structure no. 53 0618

Built
1949
76 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
153 ft
2 main spans
Daily traffic
4,200
2018 count
Owner
State
State Highway Agency

About this bridge

Bonnie Brae ST over Route 101 is a concrete continuous box beam or girders - multiple carrying Bonnie Brae ST over Route 101 in Los Angeles County, California. It was built in 1949, so it is 76 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 4,200 vehicles a day, roughly 1% of them trucks, projected to reach 5,664 by 2040. The structure is 153 ft (46.6 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBonnie Brae ST
CrossesRoute 101
Location07-LA-101-2.71-LA
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.07076, -118.26461
Functional classUrban Local

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.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating22.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length153 ft (46.6 m)
Longest span73 ft (22.3 m)
Deck width54 ft (16.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2018)
Projected traffic5,664 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Bonnie Brae ST over Route 101 built?

It was built in 1949, making it 76 years old in 2025.

What condition is Bonnie Brae ST 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 May 2023.

How much traffic does Bonnie Brae ST over Route 101 carry?

About 4,200 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Bonnie Brae ST over Route 101?

The structure is 153 ft (46.6 m) long with a longest span of 73 ft (22.3 m) and a deck 54 ft wide.

Who owns Bonnie Brae ST over Route 101?

It is owned by the State Highway Agency.