US Bridges

State Route 91 over SR 605 & Ramps

Fair

Los Angeles County, California · 07-LA-091-R16.90-CRTS · Structure no. 53 1704

Built
1966
59 years old, rebuilt 1994
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
494 ft
6 main spans
Daily traffic
242,000
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 91 over SR 605 & Ramps is a concrete continuous box beam or girders - multiple carrying State Route 91 over SR 605 & Ramps in Los Angeles County, California. It was built in 1966 and reconstructed in 1994, so it is 59 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 242,000 vehicles a day, roughly 12% of them trucks, projected to reach 258,112 by 2040. The structure is 494 ft (150.6 m) long and 150 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesState Route 91
CrossesSR 605 & Ramps
Location07-LA-091-R16.90-CRTS
RouteState Highway 91
Coordinates33.87614, -118.10315
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
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating75.6 US tons
Inventory rating45.6 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length494 ft (150.6 m)
Longest span91 ft (27.8 m)
Deck width150 ft (45.6 m)
Roadway width145 ft (44.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic242,000 (2019)
Projected traffic258,112 by 2040
Trucks12%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 State Route 91 over SR 605 & Ramps built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1994.

What condition is State Route 91 over SR 605 & Ramps 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 August 2023.

How much traffic does State Route 91 over SR 605 & Ramps carry?

About 242,000 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is State Route 91 over SR 605 & Ramps?

The structure is 494 ft (150.6 m) long with a longest span of 91 ft (27.8 m) and a deck 150 ft wide.

Who owns State Route 91 over SR 605 & Ramps?

It is owned by the State Highway Agency.