State Route 99 SB over 9th Street
GoodStanislaus County, California · 10-STA-099-R13.90 · Structure no. 38 0082L
- Built
- 1963
- 62 years old
- Condition
- Good
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 239 ft
- 4 main spans
- Daily traffic
- 52,500
- 2011 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over 9th Street is a concrete continuous box beam or girders - multiple carrying State Route 99 SB over 9th Street in Stanislaus 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 52,500 vehicles a day, roughly 12% of them trucks, projected to reach 65,480 by 2041. The structure is 239 ft (72.9 m) long and 52 ft wide. If it were closed, the detour would be 6.2 mi (10 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 SB over 9th Street built?
It was built in 1963, making it 62 years old in 2025.
What condition is State Route 99 SB over 9th Street 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 March 2023.
How much traffic does State Route 99 SB over 9th Street carry?
About 52,500 vehicles per day (2011 count), of which roughly 12% are trucks.
How long is State Route 99 SB over 9th Street?
The structure is 239 ft (72.9 m) long with a longest span of 66 ft (20 m) and a deck 52 ft wide.
Who owns State Route 99 SB over 9th Street?
It is owned by the State Highway Agency.