State Route 99 SB over Calaveras River
GoodSan Joaquin County, California · 10-SJ-099-21.79 · Structure no. 29 0008L
- Built
- 1930
- 95 years old, rebuilt 2007
- Condition
- Good
- inspected June 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 102 ft
- 3 main spans
- Daily traffic
- 35,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over Calaveras River is a concrete continuous tee beam carrying State Route 99 SB over Calaveras River in San Joaquin County, California. It was built in 1930 and reconstructed in 2007, so it is 95 years old, older 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 35,500 vehicles a day, roughly 13% of them trucks, projected to reach 60,720 by 2046. The structure is 102 ft (31.1 m) long and 72 ft wide. If it were closed, the detour would be 5 mi (8 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 | 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 99 SB over Calaveras River built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 2007.
What condition is State Route 99 SB over Calaveras River 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 June 2024.
How much traffic does State Route 99 SB over Calaveras River carry?
About 35,500 vehicles per day (2009 count), of which roughly 13% are trucks.
How long is State Route 99 SB over Calaveras River?
The structure is 102 ft (31.1 m) long with a longest span of 34 ft (10.4 m) and a deck 72 ft wide.
Who owns State Route 99 SB over Calaveras River?
It is owned by the State Highway Agency.