US Bridges

Knott Avenue over Fullerton Creek Channel

Good

Orange County, California · 0.2 M N. Orangethorpe Ave · Structure no. 55C0200

Built
1950
75 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete Continuous
Length
62 ft
3 main spans
Daily traffic
25,000
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

Knott Avenue over Fullerton Creek Channel is a concrete continuous slab carrying Knott Avenue over Fullerton Creek Channel in Orange County, California. It was built in 1950, so it is 75 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 25,000 vehicles a day, roughly 3% of them trucks, projected to reach 53,263 by 2040. The structure is 62 ft (18.9 m) long and 93 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesKnott Avenue
CrossesFullerton Creek Channel
Location0.2 M N. Orangethorpe Ave
RouteCity Street 0
Coordinates33.86197, -118.01111
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length62 ft (18.9 m)
Longest span20 ft (6.1 m)
Deck width93 ft (28.3 m)
Roadway width79 ft (24 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2017)
Projected traffic53,263 by 2040
Trucks3%
Lanes on structure6
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 Knott Avenue over Fullerton Creek Channel built?

It was built in 1950, making it 75 years old in 2025.

What condition is Knott Avenue over Fullerton Creek 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 May 2023.

How much traffic does Knott Avenue over Fullerton Creek Channel carry?

About 25,000 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Knott Avenue over Fullerton Creek Channel?

The structure is 62 ft (18.9 m) long with a longest span of 20 ft (6.1 m) and a deck 93 ft wide.

Who owns Knott Avenue over Fullerton Creek Channel?

It is owned by the City or Municipal Highway Agency.