US Bridges

Calloway Drive over Kern River

Fair

Kern County, California · 0.1 MI N of Stockdale HWY · Structure no. 50C0327

Built
1997
28 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
461 ft
14 main spans
Daily traffic
20,400
2009 count
Owner
City
City or Municipal Highway Agency

About this bridge

Calloway Drive over Kern River is a concrete continuous slab carrying Calloway Drive over Kern River in Kern County, California. It was built in 1997, so it is 28 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 20,400 vehicles a day, roughly 10% of them trucks, projected to reach 54,146 by 2045. The structure is 461 ft (140.4 m) long and 98 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCalloway Drive
CrossesKern River
Location0.1 MI N of Stockdale HWY
RouteCity Street 0
CountyKern County
StateCalifornia
Coordinates35.35521, -119.11531
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: 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 typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20
Structure length461 ft (140.4 m)
Longest span34 ft (10.4 m)
Deck width98 ft (29.9 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,400 (2009)
Projected traffic54,146 by 2045
Trucks10%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Calloway Drive over Kern River built?

It was built in 1997, making it 28 years old in 2025.

What condition is Calloway Drive over Kern River 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 October 2023.

How much traffic does Calloway Drive over Kern River carry?

About 20,400 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is Calloway Drive over Kern River?

The structure is 461 ft (140.4 m) long with a longest span of 34 ft (10.4 m) and a deck 98 ft wide.

Who owns Calloway Drive over Kern River?

It is owned by the City or Municipal Highway Agency.