State Route 99 NB over Walnut Ave
GoodStanislaus County, California · 10-STA-099-R3.08-TUR · Structure no. 38 0124R
- Built
- 1973
- 52 years old
- Condition
- Good
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 105 ft
- 1 main span
- Daily traffic
- 34,905
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 NB over Walnut Ave is a prestressed concrete box beam or girders - multiple carrying State Route 99 NB over Walnut Ave 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 105 ft (32 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 NB over Walnut Ave built?
It was built in 1973, making it 52 years old in 2025.
What condition is State Route 99 NB over Walnut Ave 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 NB over Walnut Ave carry?
About 34,905 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is State Route 99 NB over Walnut Ave?
The structure is 105 ft (32 m) long with a longest span of 105 ft (31.9 m) and a deck 53 ft wide.
Who owns State Route 99 NB over Walnut Ave?
It is owned by the State Highway Agency.