Williamson RD over Walthall Slough
GoodSan Joaquin County, California · 0.4 MI E of Oak Street · Structure no. 29C0284
- Built
- 1988
- 37 years old
- Condition
- Good
- inspected September 2024
- Type
- Slab
- Concrete Continuous
- Length
- 97 ft
- 3 main spans
- Daily traffic
- 398
- 2013 count
- Owner
- County
- County Highway Agency
About this bridge
Williamson RD over Walthall Slough is a concrete continuous slab carrying Williamson RD over Walthall Slough in San Joaquin County, California. It was built in 1988, so it is 37 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 398 vehicles a day, roughly 10% of them trucks, projected to reach 712 by 2042. The structure is 97 ft (29.7 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Williamson RD over Walthall Slough built?
It was built in 1988, making it 37 years old in 2025.
What condition is Williamson RD over Walthall Slough in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.
How much traffic does Williamson RD over Walthall Slough carry?
About 398 vehicles per day (2013 count), of which roughly 10% are trucks.
How long is Williamson RD over Walthall Slough?
The structure is 97 ft (29.7 m) long with a longest span of 38 ft (11.6 m) and a deck 31 ft wide.
Who owns Williamson RD over Walthall Slough?
It is owned by the County Highway Agency.