State Route 99 NB over Lerdo Canal
FairKern County, California · 06-KER-099-32.42 · Structure no. 50 0133
- Built
- 1936
- 89 years old, rebuilt 2020
- Condition
- Fair
- inspected January 2025
- Type
- Slab
- Concrete Continuous
- Length
- 49 ft
- 2 main spans
- Daily traffic
- 90,000
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 NB over Lerdo Canal is a concrete continuous slab carrying State Route 99 NB over Lerdo Canal in Kern County, California. It was built in 1936 and reconstructed in 2020, so it is 89 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 90,000 vehicles a day, roughly 29% of them trucks, projected to reach 119,360 by 2047. The structure is 49 ft (14.9 m) long and 129 ft wide. If it were closed, the detour would be 11.2 mi (18 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 NB over Lerdo Canal built?
It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2020.
What condition is State Route 99 NB over Lerdo Canal 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 January 2025.
How much traffic does State Route 99 NB over Lerdo Canal carry?
About 90,000 vehicles per day (2018 count), of which roughly 29% are trucks.
How long is State Route 99 NB over Lerdo Canal?
The structure is 49 ft (14.9 m) long with a longest span of 24 ft (7.3 m) and a deck 129 ft wide.
Who owns State Route 99 NB over Lerdo Canal?
It is owned by the State Highway Agency.