Lerdo Highway over California Aqueduct
PoorKern County, California · 6 MI West of Interstate 5 · Structure no. 50C0105
- Built
- 1966
- 59 years old
- Condition
- Poor
- inspected March 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 192 ft
- 3 main spans
- Daily traffic
- 2,492
- 2011 count
- Owner
- State
- Other State Agency
About this bridge
Lerdo Highway over California Aqueduct is a concrete continuous tee beam carrying Lerdo Highway over California Aqueduct in Kern County, California. It was built in 1966, so it is 59 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 2,492 vehicles a day, roughly 30% of them trucks, projected to reach 5,362 by 2041. The structure is 192 ft (58.5 m) long and 32 ft wide. If it were closed, the detour would be 10.6 mi (17 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lerdo Highway over California Aqueduct built?
It was built in 1966, making it 59 years old in 2025.
What condition is Lerdo Highway over California Aqueduct in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.
How much traffic does Lerdo Highway over California Aqueduct carry?
About 2,492 vehicles per day (2011 count), of which roughly 30% are trucks.
How long is Lerdo Highway over California Aqueduct?
The structure is 192 ft (58.5 m) long with a longest span of 72 ft (21.9 m) and a deck 32 ft wide.
Who owns Lerdo Highway over California Aqueduct?
It is owned by the Other State Agency and maintained by the County Highway Agency.