US Bridges

Planz Road over Kern Island Canal

Fair

Kern County, California · East of South H ST · Structure no. 50C0152

Built
1952
73 years old, rebuilt 1985
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
27 ft
3 main spans
Daily traffic
14,700
2005 count
Owner
City
City or Municipal Highway Agency

About this bridge

Planz Road over Kern Island Canal is a concrete continuous culvert carrying Planz Road over Kern Island Canal in Kern County, California. It was built in 1952 and reconstructed in 1985, so it is 73 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 14,700 vehicles a day, roughly 5% of them trucks, projected to reach 25,221 by 2043. The structure is 27 ft (8.2 m) long and 85 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesPlanz Road
CrossesKern Island Canal
LocationEast of South H ST
RouteCity Street 0
CountyKern County
StateCalifornia
Coordinates35.32479, -119.02102
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span9 ft (2.7 m)
Deck width85 ft (25.8 m)
Roadway width68 ft (20.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,700 (2005)
Projected traffic25,221 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Planz Road over Kern Island Canal built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1985.

What condition is Planz Road over Kern Island Canal 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 November 2023.

How much traffic does Planz Road over Kern Island Canal carry?

About 14,700 vehicles per day (2005 count), of which roughly 5% are trucks.

How long is Planz Road over Kern Island Canal?

The structure is 27 ft (8.2 m) long with a longest span of 9 ft (2.7 m) and a deck 85 ft wide.

Who owns Planz Road over Kern Island Canal?

It is owned by the City or Municipal Highway Agency.