US Bridges

Clybourn Ave over Hanson Heights Channel

Fair

Los Angeles County, California · 2.4 KM North of I-5 · Structure no. 53C1684

Built
1963
62 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
32 ft
1 main span
Daily traffic
10
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Clybourn Ave over Hanson Heights Channel is a concrete culvert carrying Clybourn Ave over Hanson Heights Channel in Los Angeles County, California. It was built in 1963, so it is 62 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 6 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 10 vehicles a day, roughly 1% of them trucks, projected to reach 15 by 2043. The structure is 32 ft (9.8 m) long and 20 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesClybourn Ave
CrossesHanson Heights Channel
Location2.4 KM North of I-5
RouteCity Street 0
CountyLos Angeles County
StateCalifornia
Coordinates34.2443, -118.36868
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span24 ft (7.3 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2020)
Projected traffic15 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Clybourn Ave over Hanson Heights Channel built?

It was built in 1963, making it 62 years old in 2025.

What condition is Clybourn Ave over Hanson Heights Channel 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 Clybourn Ave over Hanson Heights Channel carry?

About 10 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Clybourn Ave over Hanson Heights Channel?

The structure is 32 ft (9.8 m) long with a longest span of 24 ft (7.3 m) and a deck 20 ft wide.

Who owns Clybourn Ave over Hanson Heights Channel?

It is owned by the City or Municipal Highway Agency.