US Bridges

W91-N&S605 Conn over Studebaker Road

Fair

Los Angeles County, California · 07-LA-091-R17.09-CRTS · Structure no. 53 1707F

Built
1968
57 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
153 ft
1 main span
Daily traffic
40,000
2019 count
Owner
State
State Highway Agency

About this bridge

W91-N&S605 Conn over Studebaker Road is a prestressed concrete box beam or girders - multiple carrying W91-N&S605 Conn over Studebaker Road 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 40,000 vehicles a day, roughly 6% of them trucks, projected to reach 45,051 by 2040. The structure is 153 ft (46.7 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesW91-N&S605 Conn
CrossesStudebaker Road
Location07-LA-091-R17.09-CRTS
RouteState Highway 91
CountyLos Angeles County
StateCalifornia
Coordinates33.87763, -118.10002
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 evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating53.2 US tons
Inventory rating30 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length153 ft (46.7 m)
Longest span153 ft (46.7 m)
Deck width38 ft (11.6 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,000 (2019)
Projected traffic45,051 by 2040
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 W91-N&S605 Conn over Studebaker Road built?

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

What condition is W91-N&S605 Conn over Studebaker Road 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 W91-N&S605 Conn over Studebaker Road carry?

About 40,000 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is W91-N&S605 Conn over Studebaker Road?

The structure is 153 ft (46.7 m) long with a longest span of 153 ft (46.7 m) and a deck 38 ft wide.

Who owns W91-N&S605 Conn over Studebaker Road?

It is owned by the State Highway Agency.