US Bridges

State Route 91 over Walker Street

Good

Orange County, California · 12-ORA-091-R0.28-LPMA · Structure no. 55 0308

Built
1969
56 years old, rebuilt 1998
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
165 ft
3 main spans
Daily traffic
235,500
2016 count
Owner
State
State Highway Agency

About this bridge

State Route 91 over Walker Street is a concrete continuous box beam or girders - multiple carrying State Route 91 over Walker Street in Orange County, California. It was built in 1969 and reconstructed in 1998, so it is 56 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 235,500 vehicles a day, roughly 8% of them trucks, projected to reach 271,000 by 2042. The structure is 165 ft (50.4 m) long and 176 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 91
CrossesWalker Street
Location12-ORA-091-R0.28-LPMA
RouteState Highway 91
Coordinates33.86012, -118.03778
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length165 ft (50.4 m)
Longest span92 ft (28 m)
Deck width176 ft (53.5 m)
Roadway width171 ft (52.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic235,500 (2016)
Projected traffic271,000 by 2042
Trucks8%
Lanes on structure11
Traffic directionTwo-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 State Route 91 over Walker Street built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1998.

What condition is State Route 91 over Walker Street in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does State Route 91 over Walker Street carry?

About 235,500 vehicles per day (2016 count), of which roughly 8% are trucks.

How long is State Route 91 over Walker Street?

The structure is 165 ft (50.4 m) long with a longest span of 92 ft (28 m) and a deck 176 ft wide.

Who owns State Route 91 over Walker Street?

It is owned by the State Highway Agency.