US Bridges

State Route 178 over Hillside

Fair

Kern County, California · 06-KER-178-13.78 · Structure no. 50 0182

Built
1922
103 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete
Length
22 ft
1 main span
Daily traffic
4,350
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 178 over Hillside is a concrete tee beam carrying State Route 178 over Hillside in Kern County, California. It was built in 1922, so it is 103 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 4,350 vehicles a day, projected to reach 14,452 by 2044. The structure is 22 ft (6.7 m) long and 28 ft wide. If it were closed, the detour would be 88.2 mi (142 km).

Location

Open in Google Maps
CarriesState Route 178
CrossesHillside
Location06-KER-178-13.78
RouteState Highway 178
CountyKern County
StateCalifornia
Coordinates35.44161, -118.79316
Functional classRural Principal Arterial - Other

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 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,350 (2009)
Projected traffic14,452 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed88.2 mi (142 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 178 over Hillside built?

It was built in 1922, making it 103 years old in 2025.

What condition is State Route 178 over Hillside 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 State Route 178 over Hillside carry?

About 4,350 vehicles per day (2009 count).

How long is State Route 178 over Hillside?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.

Who owns State Route 178 over Hillside?

It is owned by the State Highway Agency.