US Bridges

Kirby Street over Whittier Avenue Channel

Good

Riverside County, California · 0.47 Mi. N/O Stetson Ave. · Structure no. 56C0221

Built
1972
53 years old, rebuilt 1987
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
27 ft
1 main span
Daily traffic
13,000
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Kirby Street over Whittier Avenue Channel is a concrete slab carrying Kirby Street over Whittier Avenue Channel in Riverside County, California. It was built in 1972 and reconstructed in 1987, so it is 53 years old, younger 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 13,000 vehicles a day, roughly 1% of them trucks, projected to reach 17,388 by 2043. The structure is 27 ft (8.2 m) long and 75 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesKirby Street
CrossesWhittier Avenue Channel
Location0.47 Mi. N/O Stetson Ave.
RouteCity Street 0
Coordinates33.7365, -116.99761
Functional classUrban Other Principal Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width75 ft (22.9 m)
Roadway width63 ft (19.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2014)
Projected traffic17,388 by 2043
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Kirby Street over Whittier Avenue Channel built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 1987.

What condition is Kirby Street over Whittier Avenue Channel 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 October 2023.

How much traffic does Kirby Street over Whittier Avenue Channel carry?

About 13,000 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Kirby Street over Whittier Avenue Channel?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 75 ft wide.

Who owns Kirby Street over Whittier Avenue Channel?

It is owned by the City or Municipal Highway Agency.