State Route 99 SB over UP RR
FairKern County, California · 06-KER-099-R43.42L · Structure no. 50 0011L
- Built
- 1970
- 55 years old, rebuilt 2005
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 354 ft
- 3 main spans
- Daily traffic
- 30,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over UP RR is a prestressed concrete continuous stringer/multi-beam or girder carrying State Route 99 SB over UP RR in Kern County, California. It was built in 1970 and reconstructed in 2005, so it is 55 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 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 30,500 vehicles a day, roughly 28% of them trucks, projected to reach 58,742 by 2045. The structure is 354 ft (107.9 m) long and 53 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 SB over UP RR built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2005.
What condition is State Route 99 SB over UP RR 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 State Route 99 SB over UP RR carry?
About 30,500 vehicles per day (2009 count), of which roughly 28% are trucks.
How long is State Route 99 SB over UP RR?
The structure is 354 ft (107.9 m) long with a longest span of 119 ft (36.2 m) and a deck 53 ft wide.
Who owns State Route 99 SB over UP RR?
It is owned by the State Highway Agency.