US Bridges

State Route 99 over Gilmore Ave

Good

Kern County, California · 06-KER-099-26.08-BKD · Structure no. 50 0262

Built
1963
62 years old, rebuilt 1996
Condition
Good
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
130 ft
3 main spans
Daily traffic
114,000
2018 count
Owner
State
State Highway Agency

About this bridge

State Route 99 over Gilmore Ave is a concrete continuous tee beam carrying State Route 99 over Gilmore Ave in Kern County, California. It was built in 1963 and reconstructed in 1996, 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 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 114,000 vehicles a day, roughly 28% of them trucks, projected to reach 160,692 by 2045. The structure is 130 ft (39.6 m) long and 151 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesState Route 99
CrossesGilmore Ave
Location06-KER-099-26.08-BKD
RouteState Highway 99
Coordinates35.3893, -119.04427
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length130 ft (39.6 m)
Longest span56 ft (17.1 m)
Deck width151 ft (46 m)
Roadway width145 ft (44.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic114,000 (2018)
Projected traffic160,692 by 2045
Trucks28%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 State Route 99 over Gilmore Ave built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1996.

What condition is State Route 99 over Gilmore Ave 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 State Route 99 over Gilmore Ave carry?

About 114,000 vehicles per day (2018 count), of which roughly 28% are trucks.

How long is State Route 99 over Gilmore Ave?

The structure is 130 ft (39.6 m) long with a longest span of 56 ft (17.1 m) and a deck 151 ft wide.

Who owns State Route 99 over Gilmore Ave?

It is owned by the State Highway Agency.