State Route 12 over State Route 99
GoodSan Joaquin County, California · 10-SJ-012-18.08-LOD · Structure no. 29 0150
- Built
- 1963
- 62 years old
- Condition
- Good
- inspected July 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 202 ft
- 4 main spans
- Daily traffic
- 11,800
- 2014 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 12 over State Route 99 is a concrete continuous tee beam carrying State Route 12 over State Route 99 in San Joaquin County, California. It was built in 1963, so it is 62 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 11,800 vehicles a day, roughly 6% of them trucks, projected to reach 16,811 by 2042. The structure is 202 ft (61.7 m) long and 78 ft wide.
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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 12 over State Route 99 built?
It was built in 1963, making it 62 years old in 2025.
What condition is State Route 12 over State Route 99 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 July 2024.
How much traffic does State Route 12 over State Route 99 carry?
About 11,800 vehicles per day (2014 count), of which roughly 6% are trucks.
How long is State Route 12 over State Route 99?
The structure is 202 ft (61.7 m) long with a longest span of 68 ft (20.8 m) and a deck 78 ft wide.
Who owns State Route 12 over State Route 99?
It is owned by the State Highway Agency.