State Route 99 NB over Calaveras River
FairSan Joaquin County, California · 10-SJ-099-21.79 · Structure no. 29 0008R
- Built
- 1949
- 76 years old, rebuilt 2007
- Condition
- Fair
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 134 ft
- 3 main spans
- Daily traffic
- 35,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 NB over Calaveras River is a steel stringer/multi-beam or girder carrying State Route 99 NB over Calaveras River in San Joaquin County, California. It was built in 1949 and reconstructed in 2007, so it is 76 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 6 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 35,500 vehicles a day, roughly 13% of them trucks, projected to reach 60,720 by 2046. The structure is 134 ft (40.8 m) long and 68 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 NB over Calaveras River built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2007.
What condition is State Route 99 NB over Calaveras River 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 June 2024.
How much traffic does State Route 99 NB over Calaveras River carry?
About 35,500 vehicles per day (2009 count), of which roughly 13% are trucks.
How long is State Route 99 NB over Calaveras River?
The structure is 134 ft (40.8 m) long with a longest span of 54 ft (16.5 m) and a deck 68 ft wide.
Who owns State Route 99 NB over Calaveras River?
It is owned by the State Highway Agency.