Sonora Road over Stanislaus River
FairStanislaus County, California · Knights Ferry · Structure no. 38C0297
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 264 ft
- 2 main spans
- Daily traffic
- 598
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Sonora Road over Stanislaus River is a prestressed concrete continuous box beam or girders - multiple carrying Sonora Road over Stanislaus River in Stanislaus County, California. It was built in 1987, so it is 38 years old, younger 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 598 vehicles a day, roughly 13% of them trucks, projected to reach 1,848 by 2045. The structure is 264 ft (80.5 m) long and 46 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| 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 Sonora Road over Stanislaus River built?
It was built in 1987, making it 38 years old in 2025.
What condition is Sonora Road over Stanislaus River 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 September 2023.
How much traffic does Sonora Road over Stanislaus River carry?
About 598 vehicles per day (2017 count), of which roughly 13% are trucks.
How long is Sonora Road over Stanislaus River?
The structure is 264 ft (80.5 m) long with a longest span of 131 ft (39.9 m) and a deck 46 ft wide.
Who owns Sonora Road over Stanislaus River?
It is owned by the County Highway Agency.