US Bridges

Palm Avenue over State Route 99

Fair

Kern County, California · 06-KER-099-24.11-BKD · Structure no. 50 0261

Built
1963
62 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
208 ft
4 main spans
Daily traffic
6,000
2018 count
Owner
State
State Highway Agency

About this bridge

Palm Avenue over State Route 99 is a concrete continuous tee beam carrying Palm Avenue over State Route 99 in Kern County, California. It was built in 1963, so it is 62 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 6,000 vehicles a day, roughly 1% of them trucks, projected to reach 7,651 by 2045. The structure is 208 ft (63.4 m) long and 82 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesPalm Avenue
CrossesState Route 99
Location06-KER-099-24.11-BKD
RouteCity Street 0F249
Coordinates35.36125, -119.03985
Functional classUrban 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
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating28.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length208 ft (63.4 m)
Longest span71 ft (21.6 m)
Deck width82 ft (25.1 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2018)
Projected traffic7,651 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
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 Palm Avenue over State Route 99 built?

It was built in 1963, making it 62 years old in 2025.

What condition is Palm Avenue over State Route 99 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 Palm Avenue over State Route 99 carry?

About 6,000 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Palm Avenue over State Route 99?

The structure is 208 ft (63.4 m) long with a longest span of 71 ft (21.6 m) and a deck 82 ft wide.

Who owns Palm Avenue over State Route 99?

It is owned by the State Highway Agency.