Lathrop Road over State Route 99
GoodSan Joaquin County, California · 10-SJ-099-9.18-MTCA · Structure no. 29 0331
- Built
- 2015
- 10 years old
- Condition
- Good
- inspected October 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 280 ft
- 2 main spans
- Daily traffic
- 6,000
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
Lathrop Road over State Route 99 is a prestressed concrete continuous box beam or girders - multiple carrying Lathrop Road over State Route 99 in San Joaquin County, California. It was built in 2015, so it is 10 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 6,000 vehicles a day, roughly 15% of them trucks, projected to reach 8,700 by 2042. The structure is 280 ft (85.3 m) long and 98 ft wide. If it were closed, the detour would be 4.3 mi (7 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lathrop Road over State Route 99 built?
It was built in 2015, making it 10 years old in 2025.
What condition is Lathrop Road 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 October 2024.
How much traffic does Lathrop Road over State Route 99 carry?
About 6,000 vehicles per day (2015 count), of which roughly 15% are trucks.
How long is Lathrop Road over State Route 99?
The structure is 280 ft (85.3 m) long with a longest span of 138 ft (42.2 m) and a deck 98 ft wide.
Who owns Lathrop Road over State Route 99?
It is owned by the State Highway Agency.