US Bridges

Silver Queen Road over State Route 14

Fair

Kern County, California · 09-KER-014-R12.15 · Structure no. 50 0387

Built
1972
53 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
247 ft
2 main spans
Daily traffic
20,200
2017 count
Owner
State
State Highway Agency

About this bridge

Silver Queen Road over State Route 14 is a prestressed concrete continuous box beam or girders - multiple carrying Silver Queen Road over State Route 14 in Kern County, California. It was built in 1972, so it is 53 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 20,200 vehicles a day, roughly 9% of them trucks, projected to reach 52,360 by 2041. The structure is 247 ft (75.3 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesSilver Queen Road
CrossesState Route 14
Location09-KER-014-R12.15
RouteCounty Highway 0
CountyKern County
StateCalifornia
Coordinates34.99538, -118.16007
Functional classRural Local

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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating44.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length247 ft (75.3 m)
Longest span126 ft (38.4 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,200 (2017)
Projected traffic52,360 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Silver Queen Road over State Route 14 built?

It was built in 1972, making it 53 years old in 2025.

What condition is Silver Queen Road over State Route 14 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 April 2023.

How much traffic does Silver Queen Road over State Route 14 carry?

About 20,200 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is Silver Queen Road over State Route 14?

The structure is 247 ft (75.3 m) long with a longest span of 126 ft (38.4 m) and a deck 42 ft wide.

Who owns Silver Queen Road over State Route 14?

It is owned by the State Highway Agency.