Oak Flat Road over California Aqueduct
FairStanislaus County, California · 0.4 MI West of Ward Ave · Structure no. 38C0211
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 150 ft
- 2 main spans
- Daily traffic
- 158
- 2018 count
- Owner
- State
- Other State Agency
About this bridge
Oak Flat Road over California Aqueduct is a prestressed concrete stringer/multi-beam or girder carrying Oak Flat Road over California Aqueduct in Stanislaus 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 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 158 vehicles a day, roughly 17% of them trucks, projected to reach 200 by 2042. The structure is 150 ft (45.8 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Oak Flat Road over California Aqueduct built?
It was built in 1966, making it 59 years old in 2025.
What condition is Oak Flat Road 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 August 2024.
How much traffic does Oak Flat Road over California Aqueduct carry?
About 158 vehicles per day (2018 count), of which roughly 17% are trucks.
How long is Oak Flat Road over California Aqueduct?
The structure is 150 ft (45.8 m) long with a longest span of 75 ft (22.9 m) and a deck 33 ft wide.
Who owns Oak Flat Road over California Aqueduct?
It is owned by the Other State Agency and maintained by the County Highway Agency.