US Bridges

Lerdo Highway over Westside Canal

Fair

Kern County, California · 0.8 MI of Main Drain RD · Structure no. 50C0106

Built
1968
57 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
153 ft
5 main spans
Daily traffic
1,200
2007 count
Owner
County
County Highway Agency

About this bridge

Lerdo Highway over Westside Canal is a concrete continuous slab carrying Lerdo Highway over Westside Canal in Kern County, California. It was built in 1968, so it is 57 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 1,200 vehicles a day, roughly 15% of them trucks, projected to reach 3,753 by 2041. The structure is 153 ft (46.5 m) long and 41 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesLerdo Highway
CrossesWestside Canal
Location0.8 MI of Main Drain RD
RouteCounty Highway 0
CountyKern County
StateCalifornia
Coordinates35.49938, -119.61867
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length153 ft (46.5 m)
Longest span30 ft (9.1 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2007)
Projected traffic3,753 by 2041
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Lerdo Highway over Westside Canal built?

It was built in 1968, making it 57 years old in 2025.

What condition is Lerdo Highway over Westside 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 March 2023.

How much traffic does Lerdo Highway over Westside Canal carry?

About 1,200 vehicles per day (2007 count), of which roughly 15% are trucks.

How long is Lerdo Highway over Westside Canal?

The structure is 153 ft (46.5 m) long with a longest span of 30 ft (9.1 m) and a deck 41 ft wide.

Who owns Lerdo Highway over Westside Canal?

It is owned by the County Highway Agency.