Walnut Grove Road over South Fork Mokelumne Riv
FairSan Joaquin County, California · 3.3 MI West of I 5 · Structure no. 29C0010
- Built
- 1958
- 67 years old
- Condition
- Fair
- inspected January 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 394 ft
- 3 main spans
- Daily traffic
- 2,987
- 2013 count
- Owner
- County
- County Highway Agency
About this bridge
Walnut Grove Road over South Fork Mokelumne Riv is a prestressed concrete tee beam carrying Walnut Grove Road over South Fork Mokelumne Riv in San Joaquin County, California. It was built in 1958, so it is 67 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 2,987 vehicles a day, roughly 5% of them trucks, projected to reach 3,765 by 2042. The structure is 394 ft (120.1 m) long and 33 ft wide. If it were closed, the detour would be 19.9 mi (32 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 | 7 Good | Some minor problems. |
| 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Walnut Grove Road over South Fork Mokelumne Riv built?
It was built in 1958, making it 67 years old in 2025.
What condition is Walnut Grove Road over South Fork Mokelumne Riv 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 January 2024.
How much traffic does Walnut Grove Road over South Fork Mokelumne Riv carry?
About 2,987 vehicles per day (2013 count), of which roughly 5% are trucks.
How long is Walnut Grove Road over South Fork Mokelumne Riv?
The structure is 394 ft (120.1 m) long with a longest span of 65 ft (19.8 m) and a deck 33 ft wide.
Who owns Walnut Grove Road over South Fork Mokelumne Riv?
It is owned by the County Highway Agency.