State Route 99 SB over West Main Street
GoodStanislaus County, California · 10-STA-099-R3.45-TUR · Structure no. 38 0141L
- Built
- 1973
- 52 years old
- Condition
- Good
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 142 ft
- 1 main span
- Daily traffic
- 34,905
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over West Main Street is a prestressed concrete box beam or girders - multiple carrying State Route 99 SB over West Main Street in Stanislaus County, California. It was built in 1973, so it is 52 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 34,905 vehicles a day, roughly 17% of them trucks, projected to reach 69,810 by 2045. The structure is 142 ft (43.3 m) long and 53 ft wide. If it were closed, the detour would be 0.6 mi (1 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 West Main Street built?
It was built in 1973, making it 52 years old in 2025.
What condition is State Route 99 SB over West Main 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 West Main Street carry?
About 34,905 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is State Route 99 SB over West Main Street?
The structure is 142 ft (43.3 m) long with a longest span of 142 ft (43.2 m) and a deck 53 ft wide.
Who owns State Route 99 SB over West Main Street?
It is owned by the State Highway Agency.