US Bridges

Zerker RD over Poso Creek

Fair

Kern County, California · 0.3 MI N Kimberlina RD · Structure no. 50C0264

Built
1958
67 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
146 ft
6 main spans
Daily traffic
1,100
2007 count
Owner
County
County Highway Agency

About this bridge

Zerker RD over Poso Creek is a concrete continuous slab carrying Zerker RD over Poso Creek in Kern County, California. It was built in 1958, so it is 67 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 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 1,100 vehicles a day, roughly 10% of them trucks, projected to reach 1,304 by 2046. The structure is 146 ft (44.5 m) long and 31 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesZerker RD
CrossesPoso Creek
Location0.3 MI N Kimberlina RD
RouteCounty Highway 0
CountyKern County
StateCalifornia
Coordinates35.56247, -119.15115
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length146 ft (44.5 m)
Longest span26 ft (7.9 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2007)
Projected traffic1,304 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Zerker RD over Poso Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Zerker RD over Poso Creek 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 2024.

How much traffic does Zerker RD over Poso Creek carry?

About 1,100 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is Zerker RD over Poso Creek?

The structure is 146 ft (44.5 m) long with a longest span of 26 ft (7.9 m) and a deck 31 ft wide.

Who owns Zerker RD over Poso Creek?

It is owned by the County Highway Agency.