State Route 165 over California Aqueduct
FairMerced County, California · 10-MER-165-1.08 · Structure no. 39 0199
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 305 ft
- 4 main spans
- Daily traffic
- 1,800
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 165 over California Aqueduct is a prestressed concrete stringer/multi-beam or girder carrying State Route 165 over California Aqueduct in Merced 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 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 1,800 vehicles a day, roughly 9% of them trucks, projected to reach 4,296 by 2041. The structure is 305 ft (93.1 m) long and 30 ft wide. If it were closed, the detour would be 26.1 mi (42 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 165 over California Aqueduct built?
It was built in 1966, making it 59 years old in 2025.
What condition is State Route 165 over California Aqueduct 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 April 2023.
How much traffic does State Route 165 over California Aqueduct carry?
About 1,800 vehicles per day (2009 count), of which roughly 9% are trucks.
How long is State Route 165 over California Aqueduct?
The structure is 305 ft (93.1 m) long with a longest span of 73 ft (22.3 m) and a deck 30 ft wide.
Who owns State Route 165 over California Aqueduct?
It is owned by the State Highway Agency.