State Route 99 over Poso Creek
FairKern County, California · 06-KER-099-44.54 · Structure no. 50 0007
- Built
- 1951
- 74 years old, rebuilt 1970
- Condition
- Fair
- inspected March 2024
- Type
- Slab
- Concrete Continuous
- Length
- 143 ft
- 5 main spans
- Daily traffic
- 59,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 over Poso Creek is a concrete continuous slab carrying State Route 99 over Poso Creek in Kern County, California. It was built in 1951 and reconstructed in 1970, so it is 74 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 59,000 vehicles a day, roughly 23% of them trucks, projected to reach 116,492 by 2042. The structure is 143 ft (43.6 m) long and 135 ft wide. If it were closed, the detour would be 16.2 mi (26 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 over Poso Creek built?
It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1970.
What condition is State Route 99 over Poso Creek 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 March 2024.
How much traffic does State Route 99 over Poso Creek carry?
About 59,000 vehicles per day (2020 count), of which roughly 23% are trucks.
How long is State Route 99 over Poso Creek?
The structure is 143 ft (43.6 m) long with a longest span of 28 ft (8.5 m) and a deck 135 ft wide.
Who owns State Route 99 over Poso Creek?
It is owned by the State Highway Agency.