US Bridges

7th Standard RD EB over State Route 99

Good

Kern County, California · 06-KER-099-R30.53 · Structure no. 50 0277R

Built
1964
61 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
340 ft
4 main spans
Daily traffic
14,277
2013 count
Owner
State
State Highway Agency

About this bridge

7th Standard RD EB over State Route 99 is a concrete continuous box beam or girders - multiple carrying 7th Standard RD EB over State Route 99 in Kern County, California. It was built in 1964, so it is 61 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,277 vehicles a day, roughly 15% of them trucks, projected to reach 34,316 by 2045. The structure is 340 ft (103.6 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Carries7th Standard RD EB
CrossesState Route 99
Location06-KER-099-R30.53
RouteCounty Highway 0W257
Coordinates35.44127, -119.08453
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating55.7 US tons
Inventory rating42.9 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length340 ft (103.6 m)
Longest span121 ft (36.9 m)
Deck width40 ft (12.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,277 (2013)
Projected traffic34,316 by 2045
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed8.7 mi (14 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 7th Standard RD EB over State Route 99 built?

It was built in 1964, making it 61 years old in 2025.

What condition is 7th Standard RD EB over State Route 99 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does 7th Standard RD EB over State Route 99 carry?

About 14,277 vehicles per day (2013 count), of which roughly 15% are trucks.

How long is 7th Standard RD EB over State Route 99?

The structure is 340 ft (103.6 m) long with a longest span of 121 ft (36.9 m) and a deck 40 ft wide.

Who owns 7th Standard RD EB over State Route 99?

It is owned by the State Highway Agency.