US Bridges

SR 204 (union Ave) over State Route 58

Fair

Kern County, California · 06-KER-204-R0.03-BKD · Structure no. 50 0406E

Built
1976
49 years old
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
262 ft
2 main spans
Daily traffic
30,339
2019 count
Owner
State
State Highway Agency

About this bridge

SR 204 (union Ave) over State Route 58 is a prestressed concrete continuous box beam or girders - multiple carrying SR 204 (union Ave) over State Route 58 in Kern County, California. It was built in 1976, so it is 49 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 5 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 30,339 vehicles a day, roughly 12% of them trucks, projected to reach 73,813 by 2041. The structure is 262 ft (79.9 m) long and 116 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR 204 (union Ave)
CrossesState Route 58
Location06-KER-204-R0.03-BKD
RouteState Highway 204
CountyKern County
StateCalifornia
Coordinates35.35209, -119.00282
Functional classUrban Other Principal 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating34.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length262 ft (79.9 m)
Longest span132 ft (40.3 m)
Deck width116 ft (35.4 m)
Roadway width104 ft (31.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,339 (2019)
Projected traffic73,813 by 2041
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 204 (union Ave) over State Route 58 built?

It was built in 1976, making it 49 years old in 2025.

What condition is SR 204 (union Ave) over State Route 58 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 December 2023.

How much traffic does SR 204 (union Ave) over State Route 58 carry?

About 30,339 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is SR 204 (union Ave) over State Route 58?

The structure is 262 ft (79.9 m) long with a longest span of 132 ft (40.3 m) and a deck 116 ft wide.

Who owns SR 204 (union Ave) over State Route 58?

It is owned by the State Highway Agency.