US Bridges

Fairfax Road over State Route 178

Fair

Kern County, California · 06-KER-178-R6.77-BKD · Structure no. 50 0503

Built
2009
16 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
239 ft
2 main spans
Daily traffic
17,877
2009 count
Owner
State
State Highway Agency

About this bridge

Fairfax Road over State Route 178 is a prestressed concrete continuous box beam or girders - multiple carrying Fairfax Road over State Route 178 in Kern County, California. It was built in 2009, so it is 16 years old, younger 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 17,877 vehicles a day, roughly 5% of them trucks, projected to reach 20,471 by 2044. The structure is 239 ft (72.7 m) long and 113 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesFairfax Road
CrossesState Route 178
Location06-KER-178-R6.77-BKD
RouteCity Street 0
CountyKern County
StateCalifornia
Coordinates35.39697, -118.93004
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: 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 typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length239 ft (72.7 m)
Longest span147 ft (44.9 m)
Deck width113 ft (34.5 m)
Roadway width99 ft (30.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,877 (2009)
Projected traffic20,471 by 2044
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Fairfax Road over State Route 178 built?

It was built in 2009, making it 16 years old in 2025.

What condition is Fairfax Road over State Route 178 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 2024.

How much traffic does Fairfax Road over State Route 178 carry?

About 17,877 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Fairfax Road over State Route 178?

The structure is 239 ft (72.7 m) long with a longest span of 147 ft (44.9 m) and a deck 113 ft wide.

Who owns Fairfax Road over State Route 178?

It is owned by the State Highway Agency.